Humans and their effects on the environment
- Created by: 11amabbott
- Created on: 04-08-15 10:03
View mindmap
- Humans and their effects on the environment
- Population growth
- Human Population
- the developm-ent of agriculture led to increases in population around the world.
- humans exploit their surroundings for resource
- Standards of living
- definition- how much wealth a group of people have and the goods and services available to them. Life expectancy and literacy rate may also be taken into account.
- people in the developed world enjoy a high standard of living
- people in the developin-g world have a lower standard of living but are catching up quickly
- Impact of humans
- the growth in human population and improve-ments of standard living are putting strains on the global environm-ent
- we are using up non-renewable resources quickly e.g. coal, oil, and natural gases
- raw materials are being used up rapidly
- moe land is being used up by building, quarrying, farming and dumping waste ,so there is then less land available for animals
- Land and water pollution
- Pollution
- pollution is the addition of substanc-es to the environm-ent that may be harmful to the living organisms around
- population growth and a higher standard of living can cause more waste to be produced
- Land pollution
- to improve yield produced, farmers tend to use herbicides and pesticides
- herbicides
- this reduces the competiti-on for resources lie such as minerals, space and light
- pesticides
- pesticides increase yield by killing off pests e.g. insects or plant pathogens,which would usually feed on crops
- herbicides
- some chemicals can remain in the soil for long periods of time polluting the land
- this has consequences further up the food chains
- most waste is buried at landfill sites and one of it is very unsafe
- to improve yield produced, farmers tend to use herbicides and pesticides
- Water pollution
- caused by discharge of harmful substanc-es into rivers a lakes
- minerals in fertilisers can run into rivers and cause a process called eutrophic-ation
- this is the overgrow-th of algae which leads to oxygen depletion
- depletion- using up of a useful chemical to th point at which it is too low
- this leads to the death of invertebrate and fish so the food chain and eco -system collapses
- this is the overgrow-th of algae which leads to oxygen depletion
- Sewage
- sewage also pollutes waterways
- sewage contains high levels of minerals and can promote the process of eutrophicati-on
- it also contains harmful pathogens
- Pollution
- Land and water pollution
- more waste is being produced
- Human Population
- Land and water pollution
- Pollution
- pollution is the addition of substanc-es to the environm-ent that may be harmful to the living organisms around
- population growth and a higher standard of living can cause more waste to be produced
- Land pollution
- to improve yield produced, farmers tend to use herbicides and pesticides
- herbicides
- this reduces the competiti-on for resources lie such as minerals, space and light
- pesticides
- pesticides increase yield by killing off pests e.g. insects or plant pathogens,which would usually feed on crops
- herbicides
- some chemicals can remain in the soil for long periods of time polluting the land
- this has consequences further up the food chains
- most waste is buried at landfill sites and one of it is very unsafe
- to improve yield produced, farmers tend to use herbicides and pesticides
- Water pollution
- caused by discharge of harmful substanc-es into rivers a lakes
- minerals in fertilisers can run into rivers and cause a process called eutrophic-ation
- this is the overgrow-th of algae which leads to oxygen depletion
- depletion- using up of a useful chemical to th point at which it is too low
- this leads to the death of invertebrate and fish so the food chain and eco -system collapses
- this is the overgrow-th of algae which leads to oxygen depletion
- Sewage
- sewage also pollutes waterways
- sewage contains high levels of minerals and can promote the process of eutrophicati-on
- it also contains harmful pathogens
- Pollution
- Population growth
Comments
No comments have yet been made