Unit 3 Flashcards
Learn all of unit 3
What does sustainable development mean?
Is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.
How does sustainable development achieve balance over environmental requirements, Society’s needs and economic growth.
By encouraging economic development tech appropriate to the skills,wealth and needs of the local people and using natural resources carefully and remembering to reduce, RE-use and recycle
What has caused the increase in growth of global population?
- high birth rates
- Improved public health
- Improvements in health care
Disadvantages of global food supply
- food resources aren’t evenly distributed and people across the planet do not have equal access to it.
- access to food and access to suitable nutrition are different; while not technically starving, many people are malnourished
- we are changing and degrading the natural environment which impacts on the ability to grow the extra food required.
What is food security?
It’s when everyone, at all times, have physical, social and economic access to sufficient and nutritious food which means their dietary needs and food preferences for an active and healthy life.
How do u calculate % change
Subtract old value from new then divide by old value then times by 100 .
Calculate percentage change between 1970 (2950) and 2010 (3770)
3770-2950 = 820 divided by 2950 = 0.277 times by 100 = 21.7%
7 things that make it very difficult to ensure a secure food supply.
- Disease
- Waste
- Diet
- Energy
- Water
- Climate Change
- Labour
3 main aims of FAO (Food and Agriculture Organisation)
- the eradication of hunger, food insecurity and malnutrition.
- the elimination of poverty and the driving forward of economic and social progress for all.
- the sustainable management and use of natural resources.
To achieve it’s aim the FAO must:
- help eliminate hunger, food insecurity and malnutrition.
- make agriculture, forestry and fisheries more productive and sustainable
- reduce rural poverty.
You can use agrochemicals to increase food production as they…
Replace the potassium nitrogen and phosphorus removed from the soil with fertilisers
Advantages of using machinery in agriculture
- It allows work to be done faster and more efficiently
- Farmer has to pay fewer workers which helps boost profits
Disadvantages of using machinery in agriculture
- hedgerows and ponds have to be removed in order to create a long straight run for machines to operate efficiently
- often gets rid of wildlife habitats.
There are four problems associated with poorly managed irrigation systems
Water shortages
pollution
Land degration
spread of waterborne diseases
Advantages of using HYV seeds
- Starvation and famine have been reduced across the developed countries
- Farmers are often able to grow 2 or 3 crops per season an Farming continues into dry Seasons which increases farmers profit and their quality of life
Disadvantages of using HYV seeds
- crops often need lots of fertilisers, pesticides and water to grow which increases costs and pollution
- farmers are unable to buy HYV seeds so there is no real benefit to them
Pros of GM crops and genetic modification in agriculture
- provide a solution to feed the World growing population
- artificially modified crops produce bigger yield and need less artificial fertilisers
- reduce amount of raw materials which is used in manufacturing Farm chemicals
Cons of GM crops and genetic modification in agriculture
- risk to humans
- crops and plants and may become contaminated with foreign genes added to the GM crops
- superweeds may evolve which would be difficult or impossible to get rid of
Soil can be conserved within developing countries in several ways
- crop rotation: growing crops in sequence seasons
- stone Lines: placed along contours, can trap solo move down a slope by rainwater, wind or gravity preventing soil erosion
- terracing: slopes which slow the rate of surface runoff down a slope and also creates narrow strips of flat land for cultivation on Hillside
Advantages of consuming insects
Naturally sustainable
Reproduce quickly and are more efficient in producing edible biomass
Highly nutritious and rich in protein
The common agricultural policy (CAP) have a number of aims
- increase the production of food in Europe
- to improve the standard of living foal Farm
- to secure food supplies for Europe
- to provide food for consumers at reasonable prices
Diversification means
Farmers can look towards no farming activities to boost their incomes
Farmers can apply for EU and government grants for different types of schemes.
- growing energy crops
- planting native woodland to increase biodiversity
- developing renewable energy products like wind farms
Disadvantages of using agrochemicals
- It creates a problem called eutrophication which is caused with excess nutrients are transferred into Rivers lakes and oceans
- increase in pesticides can kill or negatively effect insects
- crops sprayed with pesticides are eaten by small rodents and eventually passed up the food chain leading to Predators declining.
Disadvantages of organic farming
- requires farmers to monitor their crops regularly which takes time
- weeds and other pest often have to be removed manually
- farmers cannot produce as much as they could if they used industrial methods
- costs increase
How is trawling detrimental to marine environmentals
It’s a large net with heavy weights that dragged across the Sea floor scooping up everything in its path from the targeted fish to rare corals. This destroys large areas of seafloor habitats that give marine species food and shelter and the damage caused can be irreparable.
