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Geography > Unit 8: Environmental Management > Flashcards

Unit 8: Environmental Management Flashcards

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1
Q

Definition of renewable energy

A

Energy from sources that naturally replenish

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2
Q

Examples of renewable energy

A

Solar, wind, HEP, biomass, geothermal

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3
Q

Environmental impact of renewable energy

A

Low pollution, minimal greenhouse gases

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4
Q

Availability of renewable energy

A

Unlimited, continuously replenished

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5
Q

Cost of renewable energy

A

Initially hight but low long term maintenance costs

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6
Q

Sustainability of renewable energy

A

Highly sustainable for the future

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7
Q

Energy storage of renewable energy

A

Challenging, needs advanced technology

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8
Q

Reliability of renewable energy

A

Can be intermittent

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9
Q

Impact on ecosystem of renewable energy

A

Minimal disruption

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10
Q

Examples in use of renewable energy

A

Solar farm, wind turbines and HEP dams

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11
Q

Definition of non renewable energy

A

Energy form sources that are finite and deplete over time

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12
Q

Examples of non renewable energy

A

Coal, oil, natural gas, nuclear

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13
Q

Environmental impact of non renewable energy

A

High pollution, significant greenhouse gases

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14
Q

Availability of non renewable energy

A

Limited, will eventually run out

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15
Q

Cost of non renewable energy

A

Generally cheaper upfront but high long term costs due to resource depletion and pollution

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16
Q

Sustainability of non renewable energy

A

Unsustainable, will run out

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17
Q

Energy storage of non renewable energy

A

Easier to store, readily available in fossil form

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18
Q

Reliability of non renewable energy

A

More reliable and continuous supply when available

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19
Q

Impact on ecosystem of non renewable energy

A

Significant disruption

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20
Q

Examples in use of non renewable energy

A

Power plants using coal, oil rigs, nuclear reactors

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21
Q

Energy consumption influence on economic growth

A

Energy is required for all aspects of an economy including powering industries, transportation, homes and services. The exponential increase in energy consumption has been driven by industrialisation, population growth and technological advancements but this has led to concerns over energy security, disparities in availability and environmental degradation. Countries with abundant energy resources have higher living standards and more developed industries. The decreasing availability of these resources has led to concerns for regions that are heavily reliant on fossil fuels. As countries industrialise, demand for energy reises leading to increased competition. Energy shortages can lead to economic and social consequences

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22
Q

Challenges of energy security

A

Energy security is the uninterrupted availability of energy at an affordable price. It is more of a concern for countries that rely on imported energy. Insecurity can lead to economic instability, political tension and conflict. Security is also concerned with managing the risks associated with supply disruptions, price volatility and reliance on foreign sources. Countries without resources seek to diversify imports to reduce dependency on one supplier. Leads to conflict as nations want control over critical resources to be less vulnerable

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23
Q

Energy poverty

A

Refers to the lack of access to modern energy services. Reliance on biomass can lead to indoor pollution, a major health hazard. Energy poverty especially affects rural areas where infrastructure for electricity distribution is underdeveloped. Without electricity access economic opportunities are limited, education and healthcare suffers and living conditions are poorer. Providing access to affordable, reliable and sustainable energy is a central UN goal which will require significant investment in energy infrastructure and technology especially in renewable sources that can be used in remote areas

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24
Q

Renewable energy to address global challenges

A

Renewable sources are abundant and evenly distributed since they can be harnessed in nearly every region making them key to diversifying the global energy mix and reducing reliance on imports. Many countries transition to renewable sources to reduce greenhouse gas emissions. The intermittent nature of renewables means that energy storage and grid infrastructure needs to improve to ensure a reliable supply. Initial costs are also high but these are decreasing as technology advances

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25
Q

Global energy mix inequalities

A

The global energy mix is the combination of different energy sources to meet demands. Fossil fuels still dominate but renewable sources are increasingly important to reduce greenhouse gas emissions and combat climate change. Some countries are rich in fossil fuels and others have limited access to rely heavily on imports. This distribution can exacerbate economic disparities and contribute to energy poverty where households or regions lack access to reliable and affordable energy

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26
Q

Energy demand variations

A

Several factors influence national energy demand including population size and industrialisation. Economic growth raises energy needs since wealthier societies consume more. Climate also matters since colder countries need more heating and hot countries need more cooling. Technology and efficiency impact demand since advanced economies are more efficient. Urbanisation increases energy demand for infrastructure

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27
Q

Global variations in energy supply

A

Energy resource endowment is a countries richness in energy resources. Having resources does not necessarily mean a good supply. Must also have the technology, expertise and capital to exploit and either use or sell them

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28
Q

Physical factors affecting energy supply

A

Fossil fuel deposits are only found in a few places
Wind power needs high wind speeds throughout the year
Availability of biomass varies with climate
Large HEP development requires high precipitation, steep valleys and impermeable rock
Large power stations require flat land and stable foundations
Solar power needs a lot of days with strong sunlight
Tidal power stations require a large tidal range

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29
Q

Political factors affecting energy supply

A

Countries wanting to develop nuclear require permission
International agreements can influence energy decisions
HEP on international rivers requires agreement of the other countries
Emission legislation will favour the use of more sustainable materials
Governments may insist on companies producing a certain amount from renewables

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30
Q

Economic factors affecting energy supply

A

In poor countries FDI is essential for resource development
HEP sites close to transport and electricity routes are more economic than rural ones
Onshore oil and gas is cheaper to develop than offshore
When energy prices rise countries increase spending on research and development
Most accessible and low cost fossil fuel deposits are developed first

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31
Q

Technological development change in energy use

A

Nuclear electricity has only been available since 1954
Oil and fas can now be extracted from much deeper waters
Renewable energy technology is advancing steadily

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32
Q

Increasing national wealth change in energy use

A

As average incomes increase, living standards rise which involves an increasing use of energy and the use of a greater variety of resources

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33
Q

Changes in demand change in energy use

A

One, all the UK trains were coal powered and most homes were heated by coal. Before natural gas was discovered in the North Sea, Britain’s gas was produced form coal

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34
Q

Changes in price change in energy use

A

Relative prices of different energy types can influence demand. Electricity production in the UK is switching from coal to gas over the last 20 years because power stations are cheaper to run on natural gas

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35
Q

Environmental factors and public opinion change in energy use

A

Public opinion can influence government decisions. People are more informed about the environmental impact of energy sources than before

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36
Q

Trends in energy consumption

A

Oil, coal and natural gas hold the greatest share of global primary energy. Oil has been trending downwards from 2000 to 2020 from 37% to 32%. It then rose slightly up to 2022. Nuclear and hydroelectricity both accounted for about 6% of global primary energy in 2000. Nuclear has since declined while hydroelectricity has been relatively constant. The growth of other renewables has been rapid from 2012 at 0% to 8%. There was a slight decrease in the world consumption of oil, coal and natural gas in 2020. Coal peaked in consumption in 2010 and has been falling steadily since

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37
Q

Global energy trends

A

Oil, coal and natural gas dominate global energy mix but shares are declining as the world transitions to cleaner energy. Asia remains highly dependent on coal while natural gas plays a pivotal role in North America and Europe. The share of renewables is growing rapidly in all regions. Europe and Asia are the leaders in this shift while other regions are using clean energy. Nuclear and hydro provide reliable, low carbon energy but growth is regionally dependent. Nuclear is concentrated in North America, Europe and Asia while hydro is important in South America

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38
Q

Links between patterns and development

A

Developed countries use a wider mix of sources. They can invest in domestic energy potential and import energy. Nuclear is unattainable for many because of high set up costs. Some countries can afford it but choose not to. Richer nations can afford to invest more in renewables. In the poorest countries fuelwood is an important source of energy

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39
Q

Global pattern of per capita energy consumption

A

In general more developed countries like the USA and most of Europe have higher energy consumption. Africa tends to have a significantly lower energy consumption. Higher energy consumption per capita is also in the Northern Hemisphere. Countries including Qatar and the UAE have very high energy consumption per capita as well as most of the Middle East. The lowest energy use is in Sub-Saharan Africa, Southern Asia and Bolivia. Iceland and Sweden also have one of the highest energy consumption per capita

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40
Q

Social progress vs energy

A

Strong positive correlation. Switzerland, Sweden and Norway have high social progress and relatively high energy consumption. Iceland has the highest energy use and high social progress. Countries below the perfect line have lower development than expected when compared to energy use. UAE, Kuwait and Saudi Arabia have some of the highest energy uses but relatively lower social progress. Indonesia, Mexico and the USA are on the line of correlation so use the correct or expected amount of energy with respect to social progress

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41
Q

Advantages of natural gas

A

Lower CO2 emissions
Versatile
Reliable

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42
Q

Disadvantages of natural gas

A

Methane emissions
Price volatility
Resource endowment disparity
Infrastructure costs

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43
Q

History of global natural gas production

A

In the early 20th century natural gas was primarily a by-product of oil extraction. Its use grew as infrastructure and storage developed. Post WWII the demand for natural gas increased significantly in Europe and the US for heating and electricity. In the 2000’s the US shale gas boom revolutionised production making it a leading producer and exporter. Global LNG trade expanded allowing it to reach other markets

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44
Q

Geopolitical impacts of natural gas

A

The US transformed from a major importer to exporter reshaping markets and reducing Europe’s reliance on Russian natural gas
The Russian invasion of Ukraine highlighted the dependence on them leading to a shift to other LNG resources from the US and Qatar
Countries with rich natural gas reserves use exports as geopolitical tools
Long term climate goals require a shift towards renewables which requires gas rich nations to diversify their economies

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45
Q

Advantages of oil

A

High energy density
Versatility
Infrastructure
Energy security for producers

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46
Q

Disadvantages of oil

A

Environmental impact
Finite resource
Geopolitical risks
Air pollution

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47
Q

History of global oil production

A

In the 20th century there was the discovery of large oil fields. The demand for oil surged with the rise of industrialisation. Post WWII oil became the dominant source of global energy driving rapid economic growth especially in developed nations. In the 1970s the Arab oil embargo and Iranian Revolution caused prive spikes highlighting the worlds dependency on oil. In the 2000’s the US shale oil revolution reduced American dependency on imports altering global dynamics. Growing consumption in China and India has shifted demand towards Asia

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48
Q

Geopolitical impacts of oil

A

OPEC nations have significant influence over global oil prices
The US shale boom enhanced American energy security and reduced dependence on imports
Fluctuations in oil production can impact the stability of oil dependent economies affecting energy prices
Many developing countries rely on oil revenue and high prices can strain importing LICs

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49
Q

Advantages of coal

A

Abundance
Cost effective
Established technology

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50
Q

Disadvantages of coal

A

High CO2 emissions
Air pollution
Environmental degradation
Health risks

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51
Q

History of global coal production

A

In the 19th century coal was the backbone of the industrial revolution powering factories, steam engines and electricity generation. In the mid 20th century oil and natural gas become more widely used so coals dominance delince. In the 2000’s coal use surged in China and India due to industrialisation and energy needs

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52
Q

Geopolitical impacts of coal

A

Coal rich countries benefit from energy independence but have to balance economic growth with climate commitments
Countries with vast coal reserves have large export revenue but face international pressure to reduce coal use
Cost consumption in developing nations can conflict climate agreements leading to tension
Advances in clean coal technology can carbon capture are expensive

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53
Q

Shale oil

A

Shale oil is locked in permeable sedimentary rocks. Extracting it by fracking is more expensive than crude oil but less expensive than deep water oil. There are major shale oil deposits in USA, Russia, China and Argentina

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54
Q

Fracking

A

Water is mixed with sand and chemicals and then injected under pressure into a well to create fractures in the rock. The high pressure water is used to free the oil

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55
Q

Advantages of fracking

A

Allows firms access to hard to reach resources
Can help make nations more independent and less reliant on fuel imports

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56
Q

Disadvantages of fracking

A

Uses a lot of water that has to be transported
Chemicals may contaminate groundwater
Causes small earthquakes
Distracts firms from investing in renewables
Energy intensive

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57
Q

Factors influencing how important shale oil will be in the future

A

Difficulty and expense of extraction which depends on geology, how thick they are and the degree to which they are broken by faults and joints
How remote and accessible the deposits are
Depth of deposits
Size of deposits
World oil prices which determine the viability of oil developments
Local and global demand and need for countries to be energy secure

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58
Q

Locations of oil production and consumption

A

Oil is not evenly distributed around the world and is concentrated in specific regions. Major oil producing regions have abundant natural resources due to historical geological processes while many oil consuming countries lack significant domestic production. Highly industrialised nations consume large amounts of oil to fuel their economies, transportation and industry whereas oil rich countries have smaller domestic demand but export their surplus. Economic growth, industrialisation and lifestyle drive high oil consumption in developed nations while demand in developing countries is increasing. Geopolitical factors, government policies and technological advances further shape the disparity between production and consumption regions

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59
Q

Reserves to production ratio

A

A measure used to estimate how long a countries known oil reserves will last at the current rate of production. Gives an indication of how many years the remaining oil reserves can sustain current production levels

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60
Q

Importance of predicting peak oil production

A

Important because it has major economic, energy security and environmental implications. A decline in oil production after the peak could lead to shortages, driving up prices and causing economic disruptions. Countries that are reliant on imports could face energy crises so need to diversify energy sources and invest in renewables. Governments need to plan for long term energy investments and avoid economic shocks. As oil production declines there may be an opportunity to accelerate the shift to renewables and reduce dependency on fossil fuels to mitigate climate change. The decline in oil could lead to geopolitical tension or reliance on other polluting sources exacerbating environmental challenges

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61
Q

Why peak oil predictions vary

A

Uncertainty in reserve estimates
Technological advancements
Demand fluctuations
Geopolitical and economic factors
Environmental and regulatory constraints

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62
Q

Changes in production of coal

A

Increase in production due to strong demand from rapidly industrialising countries. Still used despite climate concerns due to availability and low cost. By 2012 it was still the most widely used energy source for electricity

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63
Q

Changes in production of oil

A

Moderate growth in production due to steady demand for transport fuels especially in developing countries. Discovery of new reserves and technology also boosted production. Oil remained vulnerable to geopolitical events and dominance was challenged

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64
Q

Changes in production of natural gas

A

Strong increase in production due to new technology and became attractive due to lower carbon emissions. Share in energy mix increased especially in electricity for transition to renewables

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65
Q

Changes in production of nucelar

A

Limited growth since while some countries explored nuclear programs, others phased them out. Public concerns also hindered expansion

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66
Q

Changes in production of hydro

A

Steady increase in production especially in regions with abundant water and investing developing nations. Used to diversify energy mixes and reduce reliance on fossil fuels

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67
Q

Changes in global production of natural gas

A

The Middle East saw the greatest increase of 122% compared to Europe and Eurasia with the smallest increase of 7%. The total world production increased by 33% which is just less than the increases of South America, Africa and Asia Pacific of 64%, 56% and 63% respectively. North America has one of the smallest increases of 7%

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68
Q

World coal reserves

A

Coal production is dominated by the Asia Pacific region. Much of this is produced in China. Consumption is also led by the Asia Pacific. Total global reserves declined from 2002-2012. The reserves to production ratio is significantly below the Asia Pacific than other regions. Reserves can be depleted in a relatively short time period. Electricity from coal gasification is more expensive than traditionally. Clean coal technology has developed forms of coal that burn more efficiency and capture pollutants before they are released

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69
Q

Disadvantages of nuclear power

A

Nuclear accidents
Radioactive waste and storage disposal
High initial and decommissioning costs
Limited fuel supply
Global security risks
Possible increase in cancers around nuclear plants

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70
Q

Advantages of nuclear power

A

Low greenhouse gas emissions
High energy density
Reliable and efficiency power generation
Reduced dependence on fossil fuels and imports
Small land footprint
Not as vulnerable to fuel price fluctuations

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71
Q

Overall global renewables capacity

A

In general, overall renewable energy capacity has increased over time up to 3870 GW in 2023. 2023 has seen the largest annual increase in capacity since 2010. The smallest annual increases were around the 2010 to 2014 period. The renewable energy capacity started at 1224 GW in 2010 and has increased at a relatively constant rate since

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72
Q

Global renewable production over time

A

In 1965 hydropower made up the majority of renewable energy production. Other renewables were introduced more around 2000 and wind started to make more of a contribution before solar but both were around 2010. Hydropower has increased from about 1000 TW to 4000 TW while total renewable production exceeded 8000 TWh in 2023

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73
Q

Traditional sources of energy

A

Coal
Oil
Gas
Nuclear
HEP

74
Q

New sources of energy

A

Wind power
Biofuel
Geothermal
Solar
Tidal

75
Q

Fuelwood

A

Crucial energy source in many developing countries especially in rural areas. It provides a significant portion of energy needs for cooking and heating due to affordability and accessibility. COntributes to deforestation and forest degradation especially when harvested unsustainability. Can lead to habitat loss, soil erosion and loss of biodiversity. Burning fuelwood in traditional stoves releases smoke and particulate matter leading to indoor pollution which is a health risk contributing to respiratory diseases especially for women and children

76
Q

Solutions to fuelwood

A

Burning fuelwood releases CO2 but the impact on net emissions can be less than fossil fuels if the wood is sourced from sustainable forestry practices. Unsustainable harvesting can cause carbon loss from deforestation. In some areas there is a transition to cleaner, more efficient energy like liquefied petroleum gas, biogas and solar. This aims to reduce reliance on fuelwood and improve health and environmental sustainability

77
Q

HEP technology

A

Generated by capturing the energy from flowing or falling water using turbines connected to generators through kinetic energy being converted to mechanical energy. It is the most established renewable energy source

78
Q

HEP timeline

A

1880s: The first HEP plants were built
20th century: Large scale dams like the Hoover Dam were constructed

79
Q

HEP current production and global distribution

A

It generates about 1300 GW globally contributing to about 16% of the worlds electricity
Top producers are China with the Three Gorges Dam, Brazil and Canada
Norway generates most of its electricity from HEP

80
Q

HEP advantages

A

Reliable and consistent
Can store for peak demand
No emissions during operation

81
Q

HEP disadvantages

A

Environmental impact of damming
Limited suitable locations
High upfront costs

82
Q

HEP future potential

A

In the future HEP will continue to play a role with innovations like pumped storage hydro and small scale hydro gaining attention

83
Q

Wind technology

A

Wind energy is generated using turbines that convert kinetic energy of wind into electrical power. Modern turbines are highly efficient and come in both onshore and offshore configurations

84
Q

Wind timeline

A

1887: The first wind turbines for electricity generation were invented
1980s: The technology began to be used on a larger scale
2000s: Wind energy saw rapid growth due to concerns over climate change and advances in turbine design

85
Q

Wind current production and global distribution

A

Produces around 900 GW globally making up about 6% of the worlds electricity generation. Top producers are China, the USA and Germany. Offshore wind is particularly prevalent in the UK and Denmark

86
Q

Wind advantages

A

Clean and renewable
Doesn’t take up much ground space
Offshore farms have high energy capacity

87
Q

Wind disadvantages

A

Intermittent
Can affect local wildlife
Noise and visual impct

88
Q

Wind future potential

A

Wind energy has significant future potential especially with floating offshore wind farms and improvements in turbine efficiency

89
Q

Biomass technology

A

Biomass energy is derived from organic materials like wood, agricultural residues and animal waste which can be burned directly or converted into biofuels for energy production

90
Q

Biomass timeline

A

Ancient times: Humans have used biomass for heating and cooking
20th century: Development of biofuels and modern biomass for power plants

91
Q

Biomass current production and global distribution

A

Produces about 600 GW of energy globally contributing about 5% of the global electricity generation. Top producers are the USA, Brazil and Germany. Scandinavian countries use biomass extensively for heating

92
Q

Biomass advantages

A

Reduces waste, can be carbon neutral
Provides renewable energy

93
Q

Biomass disadvantages

A

Competes with food production
Emissions from combustion
Deforestation if not sourced sustainably

94
Q

Biomass future potential

A

Advances in bioenergy with carbon capture and storage and second generation biofuels are likely to increase biomass’ role in a carbon neutral system

95
Q

Geothermal technology

A

Harnessed by tapping into heat within the earth either for direct heating or to generate electricity using steam from underground reservoirs

96
Q

Geothermal timeline

A

1904: The first geothermal plant was built in Italy
1970s: Commercial geothermal power plants started expanding

97
Q

Geothermal current production and global distribution

A

Produces about 15 GW which is less than 1% of global electricity but is growing. Top producers are the USA, the Philippines and Indonesia. Iceland is notable for its reliance on geothermal energy

98
Q

Geothermal advantages

A

Continuous base load supply
Minimal emissions
Small land footprint

99
Q

Geothermal disadvantages

A

Limited to active regions
High initial investment costs
Risk of inducing seismic activity

100
Q

Geothermal future potential

A

Has high growth potential in regions with suitable geology and technologies like enhanced geothermal systems aim to expand its use in non-traditional areas

101
Q

Solar technology

A

Generated by converting sunlight into electricity using photovoltaic cells or by concentrating solar power systems that use mirrors to focus sunlight to generate heat which is then used to produce electricity

102
Q

Solar timeline

A

1950s: First practical solar cells were developed
1970s: Solar power began to gain attention during the oil crises
2000s: Significant improvements in PV technology and manufacturing led to widespread adoption of solar power plants

103
Q

Solar current production and global distribution

A

Solar energy produces 1000 GW of electricity globally which is about 4% of global electricity production. China is the largest producer then the USA and India. Europe also contributes significantly especially Germany and Spain

104
Q

Solar advantages

A

Renewable and abundant
Reduced dependence on fossil fuels
No emissions during operation
Low operational costs

105
Q

Solar disadvantages

A

Intermittent production
Large areas needed for insolation
High upfront costs

106
Q

Solar future potential

A

Has immense potential due to dropping costs and increased efficiency. Recent developments include perovskite solar cells and solar storage integration

107
Q

General trends in energy consumption

A

Fossil fuel consumption generally remains dominant but the growth rate has slowed in HICs as they transition to renewable energy. LICs have limited access to nuclear power focussing more on HEP due to resource availability. MICs see substantial increases in renewable energy investment especially in wind and biofuels. HICs show a significant shift towards renewables with wind energy and biofuels seeing large increases by 2023

108
Q

Causes of the trends in energy consumption

A

Deindustrialisation, increasing energy efficiency and relatively low population growth in HICs has resulted in a decrease in primary energy. In MICs, growth rates were considerable and consistent with high rates of economic growth. Most LICs struggle to fund energy requirements but do increase. Energy is vital for economic growth and to satisfy the demands of a growing population. There is a strong positive correlation between GNP per person and economy use. In poor countries it is the high and middle income groups that can buy enough energy and tend to live where electricity is available. It is the poor who lack access to the advantages of electricity

109
Q

Trends in fossil fuel consumption

A

In 2000 consumption in LICs was minimal due to limited industrialisation and infrastructure. By 2023 slight increases were seen reflecting some economic growth and increased urbanisation. Overall use remains low due to limited access to resources and infrastructure
In MICs demand grew from 2000 to 2010 reflecting rapid industrialisation, urbanisation and energy needs. They have been reliant on coal and oil but some have begun to diversify
HICs historically relied on fossil fuels but there has been a decline in the last decade due to a shift to cleaner energy sources, energy efficiency and a fall in coal consumption

110
Q

Trends in nuclear power consumption

A

LICs have little presence due to high costs and technical expertise being required. They have focussed on other forms of energy
MICs have been more reliant reflecting efforts to diversify and reduce reliance on coal
HICs have been significant historically but mixed recently

111
Q

Trends in renewables consumption

A

LICs roles especially HEP has been more prominent. Challenges like political instability have slowed progress
MICs have seen substantial growth driven by environmental goals and reducing fossil fuel imports
HICs have been leaders in renewables driven by climate policies and financial resources

112
Q

Drivers of change in energy consumptions

A

Economic development and industrialisation
Policy and climate commitments
Energy resource availability
Technological advancements

113
Q

Local impacts of energy

A

Power plants release pollutants like sulfur dioxide and nitrogen oxides causing smog and respiratory issues
Oil spills during extraction or transportation can contaminate local water sources harming aquatic life
Mining for coal, drilling for oil or building wind farms cna destroy local habitats and disturb wildlife
Wind turbines and transport vehicles can cause noise pollution affecting nearby communities and wildlife
Mining activities can lead to soil erosion and loss of fertile land
Release of warm water from power plants into rivers or lakes can alter local water temperatures affecting ecosystems
Large scale energy projects can displace local communities and wildlife affecting livelihoods

114
Q

Global impacts of energy

A

Burining fossil fuels releases CO2, a greenhouse gas that contributes to globa warming
Increased atmospheric CO2 levels lead to more absorption by oceans making them more acidic which threatens marine life
Energy projects can lead to deforestation reducing biodiversity and increasing CO2 levels
The warming of the planet causes polar ice caps to melt leading to rising sea levels and threatening coastal areas globally
Air pollutants can travel long distances contributing to acid rain and health problems even far from the source

115
Q

Impact of energy pathways

A

Energy pathways are supply routes between energy producers and consumers like pipelines, shipping routes and electricity cables. New pathways are constructed as firms search further afield. Some major oil and gas pipelines cross the most inhospitable terrain. Subsidence can cause temporary closure

116
Q

Micro hydro shcemes

A

Work by taking water out of the river at a high altitude and diverting the water through a turbine which then generates electricity. The water removed from the river flows back into the channel at a lower altitude

117
Q

Advantages of micro hydro schemes

A

They are many times cheaper than dam construction HEP projects. The lack of dam also means that there is no social impact in re locating populations. They use simple intermediate technology so it is straightforward and cheap to maintain and this can be done by trained locals. In dam based schemes many engineers are required to keep the operation working. They can also be flexible to the needs of local communities. They can charge batteries which can then be distributed to houses. The batteries are returned when they need re charging. Electricity can be provided to many without the need for cables or can drive machinery directly

118
Q

Small scale solar power

A

Many developing countries due to their location have vast solar potential. Solar power is more expensive than using fossil fuels currently. The issue is the lack of access to form grid systems so batteries are needed to store the electricity created. This is expensive and will have a shorter useful life than a solar panel.

119
Q

Small scale wind power

A

Common in developed countries to generate sustainable power. There is a trend of construction in developing countries and in parts of developed countries that do not have formal grid systems. They work by generating electricity and storing power in batteries. Batteries are vital since the turbine only generates power when its windy. Small wind turbines don’t generate as much energy as solar power. Solar power also requires much less maintenance

120
Q

Environmental degredation

A

Refers to the deterioration of the natural environment through human activities such as deforestation, pollution, climate change and the overuse of natural resources. It leads to the loss of biodiversity, the destruction of ecosystems and the depletion of natural resources, negatively impacting the health of the planet and its inhabitants

121
Q

Pollution

A

The introduction of harmful substances or contaminants into the environment such as air, water or soil. These can come from human activities like industrial processes, waste disposal and vehicle emissions and can harm ecosystems, human health and the planet’s natural resources

122
Q

Significance of air pollution

A

Air pollution is responsible for 7 million premature deaths each year. Fine particulate matter which can penetrate deep into the lungs and bloodstream is linked to respiratory and cardiovascular diseases. People are especially vulnerable to pollution in urban areas. Children, the elderly and those with pre existing health conditions are more at risk as long term exposure leads to reduced lung development in children

123
Q

Pattern of air pollution

A

The most deaths due to air pollution occur in Asia, especially in China, Mongolia and other Southeast Asian countries. Southern Africa has the least number of deaths due to air pollution with the most being 0-30 per million per country. Northern Africa has more but not as many as in Asia. North and South America both have about 60-100 per million deaths per country. Western Europe has even less than this but Eastern Europe matches that of Russia and North West Asia

124
Q

Causes of air pollution

A

Vehicle emissions
Industrial smoke and gases
Deforestation
Agricultural practices
Burning fossil fuels
Waste burning
Construction and mining
Household activities

125
Q

Solutions to air pollution

A

Increase use of public transport and EVs
Enforce stricter environmental regulations for factories
Reforestation and better land management
Implement cleaner farming practices
Promote the use of renewable energy sources
Improve waste management and recycling programs
Use cleaner, more efficient construction techniques
Encourage the use of clean cooking technologies

126
Q

Industrial pollution

A

Fuel and power (power stations, oil refineries)
Mineral industries (cement, glass, ceramics)
Waste disposal (incineration, chemical recovery)
Chemicals (pesticides, pharmaceuticals, organic and inorganic compounds)
Metal industries (iron and steel, smelting, non-ferrous metals)
Others such as paper manufacture, timber preparation and uranium processing

127
Q

Sulphur dioxide air pollution

A

Industry
Respiratory and cardiovascular illnesses
Precursor to acid rain which damages lakes, rivers, trees and cultural relics

128
Q

Nitrous oxide air pollution

A

Vehicles and industry
Respiratory and cardiovascular illnesses
Nitrogen deposition causing overfertilisation and eutrophication

129
Q

Particulate matter air pollution

A

Vehicles and industry
Particles penetrate lungs and can enter bloodstream
Visibility

130
Q

Carbon monoxide air pollution

A

Vehicles
Headaches and fatigue more with weak cardiovascular health

131
Q

Lead air pollution

A

Vehicles
Accumulates in bloodstream and damages nervous system
Kills fish and animals

132
Q

Ozone air pollution

A

Formed from reaction of NO and VOCs
Respiratory illnesses
Reduced crop production and forest growth, smog precursor

133
Q

Volatile organic compounds air pollution

A

Vehicles and industry
Eye and skin irritation, nausea, headaches, carcinogenic
Smog precursor

134
Q

Environmental Kuznets curve

A

Shows relationship between environmental degradation and GDP per capita, mainly that it peaks in industrial economies and begins to decline after

135
Q

Externality pollution gradient and scale

A

Shows that environmental impact decreases with distance from industry location

136
Q

Incidental pollution

A

Refers to short term, accidental or one-off events that lead to pollution often as a result of an unexpected spill, natural disaster or malfunction. Examples include oil spills, chemical accidents or volcanic eruptions. Can cause significant environmental damage but impacts tend to be temporary and the pollution may decrease once the incident is contained or natural processes begin to break down the contaminants

137
Q

Sustained pollution

A

Caused by ongoing, continuous human activities like industrial emissions, vehicle exhaust and agricultural runoff. This persists over long periods, accumulating and degrading the environment steadily. Often leads to long term damage, contributing to issues like climate change, air quality problems and soil degradation. Requires more systematic changes to reduce its ongoing impact

138
Q

Acid rain formation

A

Forms when sulfur dioxide and nitrogen oxides primarily from burning fossil fuels combine with water vapour in the atmosphere. This create sulfuric acid and nitric acid which fall to the ground as acidic precipitation

139
Q

Environmental impact of acid rain

A

Harms ecosystems by acidifying soil and water bodies which can lead to harmful effects on plant life, fish and aquatic organisms. It disrupts the natural balance of pH in rivers, lakes and forests making it harder for certain species to survive and reproduce

140
Q

Acid rain damage to infrastructure

A

Acid rain also accelerates the corrosion of buildings and infrastructure especially those made from limestone, marble and metal. Over time the acidity can erode these materials leading to the deterioration of monuments, bridges and other structures especially in urban areas with high pollution levels

141
Q

Increased UV radiation and skin cancer

A

Air pollution especially the depletion of the ozone layer allows more UV radiation from the sun to reach the Earth’s surface. UV radiation is a major risk factor for skin cancer as it can damage skin cells and increase the likelihood of mutations that lead to cancer especially melanoma and non-melanoma skin cancers

142
Q

Airborne pollutants and skin health

A

Some air pollutants such as fine particulate matter and volatile organic compounds can have direct harmful effects on the skin These can contribute to skin aging, inflammation and even skin cancer by damaging skin cells and increasing oxidative stress

143
Q

Rising skin cancer rates

A

As air pollution has increased, so have the rates of skin cancer. WHO links rising skin cancer rates to the combined effects of increased UV exposure due to ozone depletion and long term exposure to polluted air which weakens the skin’s natural defenses against cancer causing agents

144
Q

Global health risk of air pollution

A

7 million premature deaths are caused each year due to air pollution. One of the leading environmental health risks worldwide

145
Q

Sources of air pollution

A

Primarily caused by emissions from vehicles, industrial processes, agriculture and the burning of fossil fuels. The pollutants can cause or exacerbate respiratory diseases, cardiovascular problems and cancer. Long term exposure to PH2.5 has been linked to asthma, heart diseases, stroke and lung cancer

146
Q

Problems with transitioning to renewable energy for air pollution

A

This can drastically reduce emissions from power plants which are among the largest sources of air pollution worldwide. It is gaining momentum in HICs but the transition is expensive, requiring large investment in new infrastructure. Some countries have large fossil fuel industries that are integrated into the economy making it politically challenging to phase out

147
Q

Impact of air pollution on HICs

A

Have more controlled air pollution due to stricter laws and regulations. There is still pollution in urban areas from transport and industry especially in high traffic periods. They can afford to invest in cleaner technology and infrastructure

148
Q

Impact of air pollution on MICs

A

Have higher air pollution levels and regulations are not as strict. Rapid urbanisation, industrialisation and vehicle ownership have led to dangerously high pollution. They struggle to balance economic development with environmental protection and the enforcement of regulations may be weak especially in informal settlements where people rely on inefficient energy sources

149
Q

Impact of air pollution on LICs

A

Are the most vulnerable to air pollution. There is limited access to clean energy and people rely on biomass for cooking and heating. This creates indoor pollution which kills over 4 million per year especially in rural areas. They lack financial resources to invest in cleaner technology and it is a growing problem when cities expand without adequate infrastructure

150
Q

Effects of air pollution on different populations

A

Children, the elderly and those with pre-existing health conditions are especially vulnerable. Can lead to developmental issues in children, reducing lung capacity and measuring susceptibility to chronic illness. The elderly are at higher risk of respiratory problems. For those with asthma even short term exposure can be life threatening

151
Q

Water security

A

Ensuring sustainable access to adequate quantities of clean water for health, livelihoods and ecosystems which contributes to human well-being, economic development and resilience to water related risks

152
Q

Groundwater

A

Water found underground stored in spaces within rocks and soil which can be accessed by digging wells. A key source of freshwater

153
Q

Aquifers

A

Natural underground areas where groundwater is stored. Can be trapped for drinking water, farming and industry

154
Q

Water stressed areas

A

Places where there isn’t enough water to meet the needs of people and the environment. Often happens in areas with high demand, little rainfall or overuse of water

155
Q

Water scarce areas

A

Regions facing severe water shortages usually in deserts or very dry areas where there is not enough water available for peoples basic needs

156
Q

Green water

A

Water that is stored in the soil and used by plants. This is water that comes from rainfall and is important for crops and natural vegetation

157
Q

Blue water

A

Freshwater found in rivers, lakes and groundwater sources. Its the water used for drinking, irrigation and industry

158
Q

Potable water

A

Water that is safe for humans to drink because it has been cleaned to remove germs and harmful substances

159
Q

Physical water scaracity

A

When there isn’t enough natural water in an area to meet everyone’s needs often because of a dry climate or overuse of water

160
Q

Economic water scarcity

A

When there’s enough water in a region but people can’t access it because of a lack of infrastructure, resources or money to supply and store it

161
Q

Virtual water

A

The amount of water used to make products. A lot of water goes into growing cotton for a shirt or producing wheat

162
Q

Precipitation to water

A

Over half the precipitation that falls on land is never available for capture of storage because it evaporates from the ground (green water). The remainder channels into blue water sources. Farm irrigation from these is the biggest human use of freshwater. 56% of precipitation flows through landscape and 36% ends up in oceans. 5.1% is used for agriculture, 1.4% for irrigation, 1.3% is evaporated and 0.1% by cities and industries

163
Q

Ways water is used in HICs

A

Agriculture accounts for just over 40% of total water use. This is lower than the amount allocated to industry. Domestic use is the least at just under 20%. In some models, industry uses more than agriculture at about 45%

164
Q

Ways water is used in LICs/MICs

A

Agriculture accounts for over 80% of total water use with industry using more of the remainder than domestic allocation. As LICs industrialised and urban industrial complexes expand the demand for water grows rapidly in the industrial and domestic sectors causing intensified competition with agriculture

165
Q

Physical vs economic water scarcity

A

Physical is when physical access is limited and demand outstrips supply especially in arid and semi arid regions where temperatures and evaporation rates are high while precipitation is low. Economic exists when a country does not have the money to utilise an adequate supply which can be due to political and ethnic conflict leading to a lack of investment. This is expected to worsen as the population continues to increase, per person demand is rising due to increasing affluence, there is increasing demand for water heavy biofuels, climate change is increasing aridity and water sources are threatened by pollution

166
Q

Spatial variations of water scarcity

A

There is little or no water scarcity in most of North/South America, much of Europe, Russia and some areas of Oceania. There is physical water scarcity in SW USA, an area of Southern Africa, the Northern Africa coast and much of the Middle East and central Asia. Economic water scarcity is heavily concentrated in most of Africa, especially sub-saharan as well as some Southern central America countries in additional to a few areas in Southern Asia. Areas approaching physical water scarcity include a region of Peru, Southern USA into Mexico, the South coast of Africa and much of the Middle East

167
Q

Rural degredation

A

Has primarily been due to population growth and increasing pressures on the land but urban activities can also have consequences

168
Q

Soil degredation

A

A change in the shoil health status resulting in a diminished capacity of the ecosystem to provide goods and services. Involves the physical loss and loss of topsoil quality associated with nutrient decline and contamination. It has caused a 15% loss of agricultural supply

169
Q

Soil degradation in different places

A

In temperate areas it is caused by market forces and the attitudes of farmers and governments. In the tropics it results from high population pressure, land shortages and lack of awareness. The greater climate extremes and poorer soil structures give greater degradation potential. The main cause is the removal of vegetation cover leaving the surface exposed to wind and water erosion. Deforestation (37%), overgrazing (35%), agricultural mismanagement (27%) and industry and urbanisation (1%)

170
Q

Deforestation

A

Occurs due to the clearing of land for agricultural use and timber activities. These happen quickly. Rain is no longer intercepted by vegetation with rainsplash loosening the topsoil leaving it vulnerable to removal by overland flow

171
Q

Overgrazing

A

The grazing of natural pastures at stocking intensities above the livestock carrying capacity. Population pressure and poor agricultural practices have caused this

172
Q

Process of overgrazing

A

Trampling by animals damages plant leaves. Some leaves die reducing the ability of plants to photosynthesise. There are less leaves to intercept rainfall and the ground is exposed. Sensitive plant species disappear. Soil begins to erode since the soil structure is damaged and compacted. Loose surface soil particles are carried away by wind or water. Loss of structure means less water can infiltrate so growth rates are reduced

173
Q

Causes of soil degradation

A

Erosion by wind and water
Physical degradation
Chemical degradation (through pollution and changes in pH)
Biological degradation (loss of organic matter and biodiversity)
Climate and land use change
Agricultural mismanagement (pursuit of short term gain and lack of knowledge)

174
Q

Environmental and socio economic consequences of soil degradation

A

Increasing world population and changing diets with affluence puts pressure on land. A decline in long term soil productivity is limited LIC food production. Degraded soils can’t store carbon so it is released to the atmosphere

175
Q

Causes of agricultural mismanagement

A

Policy failure (pricing, subsidies and tax policies can encourage the excessive use of inputs and overexploitation of land)
Rural inequalities (rural people know how to conserve the environment but have to overexploit resources for survival, commercial exploitation degrades for higher profit)
Resource imbalances (future growth will be in LICs which are the least equipped to meet needs or invest in the future)
Unsustainable technology (new technology has increased production but have caused insect resistance to pesticides, land degradation, nutrient depletion, poor irrigation and a loss of biodiversity)
Trade relations (LICs export values have fallen so the expansion of damaging crop and timber production has been used to boost incomes)

176
Q

Impact of agro-industrialisation

A

Deforestation
Land degradation and desertification
Salinisation and contamination of water supplies
Air pollution
Increasing concerns about the health of long term farm workers
Landscape change
Declines in biodiversity

177
Q

The environmental impact of capital intensive farming

A

1/3 of farmland is affected by salinisation or erosion. There are 1.5 bn cattle which need 1/3 of total agricultural land. 1.3 bn are employed in livestock. The balance between livestock and land is currently sustainable but as demand for meat increases, land pressures will rise. Manure can lead to pollution by heavy metals. There is a strong relationship between meat consumption and incomes

178
Q

Expansion of large scale farming

A

Has expanded into fragile environments like rainforests. 7.3m hectares of rainforest are lost each year. Important breeds of livestock are becoming extinct due to overuse by commercial companies. Genetic resources need to be the basis of food security. Agro industrialisation is characterised by large areas of monoculture that leave crops more vulnerable to diseases due to the depletion of natural pest control systems. Causes pesticide reliance

179
Q

Poverty and rural degradation

A

Poor households can be compelled to degrade environments but most is caused by large commercial operations and governments. There are an increasing number of sustainable schemes being practiced in rural areas. Poor households may be pushed onto more marginal lands by logging and mining operations. Government policy can also have a significant negative effect on the poor

180
Q

Urban/rural impact

A

Urban areas can affect the environmental degradation of rural surroundings. Untreated wastewater is a major river pollutant which contaminates estuaries and coastal fishing areas and pollutes drinking water of rural communities. Urban use of groundwater can cause aquifer depletion to the detriment of small farmers who rely on shallow wells. In arid areas cities can cause saltwater intrusion under coastal areas due to groundwater pumping

181
Q
A

Geography (28 decks)

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