Ch 4 Environment Flashcards
According to an update by the Stockholm Resilience Centre from 2017, four of nine planetary boundaries have already been crossed as a result of human activity:
▶ climate change;
▶ loss of biosphere integrity;
▶ land-system change; and
▶ altered biogeochemical cycles (phosphorus and nitrogen loading).
Climate change is defined as
change of climate, directly or indirectly attributed to human activity, that alters the composition of the global atmosphere and which is, in addition to natural climate variability, observed over
comparable time periods.
Climate change is one of the most complex issues facing us today and involves many different
dimensions, including:
▶ science; ▶ economics; ▶ society; ▶ politics; and ▶ moral and ethical questions.
The main man-made driver of the warming of the planet is
rising emissions of greenhouse gases (GHGs) - Carbon dioxide (CO2) is the most significant contributor to the warming
effect, because of its higher concentration in the atmosphere, which is at levels not seen since before Homosapiens first appeared
Other important GHGs include
methane, nitrous oxide and other fluorinated gases. Although the average lifetime in the atmosphere of such gases is shorter than that of carbon dioxide, they tend to “compensate” by having a higher ‘warming potential’
Emissions of GHGs primarily come from
energy, industry, transport, agriculture and changes in land-use (such as deforestation), with CO2 resulting from the burning of fossil fuels comprising the highest share – around two-thirds - of all GHGs.
tipping points include
The melting of the permafrost
The disintegration of the West Antarctic ice sheet
The ‘dieback’ of the Amazon rainforest
Melting Arctic ice sheets
SELECT SOCIOECONOMIC IMPACTS OF CLIMATE CHANGE
LIVEABILITY AND WORKABILITY (Heat waves) FOOD SYSTEMS (drought or ocean warming) PHYSICAL ASSETS (Fire or hurrucane) INFRASTRUCTURE SERVICES (flooding) NATURAL CAPITAL (Melting of ice)
Responding to climate change is usually presented in terms of two main approaches:
- reducing and stabilising the levels of heat-trapping GHGs in the atmosphere (climate change mitigation); or
- adapting to the climate change already taking place (climate change adaptation) and increasing climate
change resilience.
Climate change mitigation is a human intervention that involves reducing the sources of GHG emissions, The goal of mitigation is to:
▶ avoid significant human interference with the climate system;
▶ stabilise GHG levels in a timeframe sufficient to allow ecosystems to adapt naturally to climate change;
▶ ensure that food production is not threatened; and
▶ enable economic development to proceed in a sustainable manner.
Examples of mitigation strategies include greater adoption and policies to promote sustainability across
different areas, such as:
▶ Energy – deploying renewable energy sources (such as wind, solar, geothermal and hydro or biofuels from
sustainable sources).
▶ Buildings – retrofitting buildings to become more energy efficient and using building materials and equipment
that reduce buildings’ carbon footprint.
▶ Transport – adopting more sustainable transportation and infrastructure, particularly in cities (such as electric
vehicles, rail and metro and bus rapid transit), but also decarbonising shipping, road and air transport.
▶ Land use and forestry – improving forest management and reducing deforestation.
▶ Agriculture – improving crop and grazing land management to increase soil carbon storage.
▶ Carbon pricing – implementing carbon reduction policies which penalise heavy emitters and promote GHG
emission reductions in the form of either a carbon tax or cap-and-trade mechanism.
▶ Industry and manufacturing – developing more energy efficient processes and products, as well as equipment
and processes to facilitate carbon capture, power storage (e.g. batteries, pump systems), recycling efficiency,
etc.
The higher the ambition of mitigation policies, the higher the required upfront investment - estiamted cost in energy?
In the energy sector alone, the International Chamber of Commerce (ICC) estimates that between US$1tn to US$4tn (£0.7tn
to £2.9tn) of additional annual investment in energy supply, and around US$1tn (£0.7tn) in energy demand
will be needed up to 2050 to limit warming to 1.5°C (2.7°F)
Adapting to a changing climate involves adjusting to actual or expected future climate events, thereby
increasing society’s resilience to climate change and reducing vulnerabilities to its harmful effects
The faster
the climate changes, the more challenging it is to adapt. The World Bank aptly describes adaptation and
resilience as ‘two sides of the same coin’
Examples of adaptation strategies include a variety of development plans on how to deal with:
▶ protecting coastlines and adapting to sea-level rise;
▶ building flood defences;
▶ managing land use and forestry practices;
▶ planning more efficiently for scarce water resources;
▶ developing drought resilient crops;
▶ protecting energy and public infrastructure; and
▶ developing clean cooling systems.
Waer is tied to SDG 6
to ensure availability and sustainable
management of water and sanitation to all’ by 2030.
Companies with exposure to deforestation in their supply chains may face material financial risks, such as:
▶ supply disruption;
▶ cost volatility; and
▶ reputational damage.
The circular economy is an economic model that aims to avoid waste and to preserve the value of resources for as long as possible
- design out waste and pollution;
- keep products and materials in use; and
- regenerate natural systems.
Circular economy is holisitic where recycling econonly has non recyclable waste
Transition risks are multiple in nature, including
▶ policy risks – such as increased emissions regulation and environmental standards (see Section 3);
▶ legal risks – such as lawsuits claiming damages from entities (corporations or sovereign states) believed to be
liable for their contribution to climate change; and
▶ technology risks – such as low-carbon innovations disrupting established industries.
A direct impact: an organisation’s activities directly affecting biodiversity. For example, when
» degraded land is converted for the benefit of production activities;
» surface water is used for irrigation purposes;
» toxic materials are released; or
» local species are disturbed through the noise and light produced at a processing site.
An indirect impact: the impact is caused by parties in an organisation’s supply chain(s).
For example, when an
organisation imports fruits and vegetables, produces cotton shirts, sells construction materials or publishes
books, the production of the inputs for these goods will have indirect impacts on biodiversity.
Define Scope 1,2,3 emissions
-direct emissions from core operations (‘Scope 1’
emissions) and;
-purchased energy (‘Scope 2’).
-indirect emissions from the whole value chain, including those produced by suppliers and
customers (‘Scope 3’ emissions).
Examples of global traceability schemes include:
▶ the Forest Stewardship Council (FSC);
▶ the Marine Stewardship Council (MSC);
▶ Roundtable for Sustainable Palm Oil (RSPO); and
▶ the Fairtrade Labelling Organizations International (FLO).
Kyoto Protocol was adopted in 1997 and became effective in 2005. It was the first international convention to set targets for emissions of the main GHGs, namely:
- CO2;
- methane (CH4);
- nitrous oxide (N2O);
+4 other
It established top-down, binding targets, but only for developed nations, recognising the historical links
between industrialisation, economic development and GHG emissions. agreement was extended to 2020 as the addoption of the paris agreement
what is the Paris Agreement
The agreement’s long-term goal is to keep the increase in global average temperature to well below 2°C (3.6°F)
above pre-industrial levels, and to limit the increase to 1.5°C (2.7°F), since this would substantially reduce the
risks and effects of climate change