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  • Created on: 01-03-10 00:06

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Human Influences on the Environment
Humans have many influences on the Environment, more than we may suspect. Human
activities has polluted the environment and reduced the amount of land for animals and plants. This
makes it harder for certain types of species to stay alive and many become extinct.
Deforestation is the cutting down of large forests. This is a huge problem as less carbon
dioxide is absorbed from the atmosphere and less oxygen it given back out. We cut down these
forests so that the land can be used for building and farming and also wood can be used for paper
and fuel. Sometime the trees can be replanted to keep the forests sustainable but because of the
need for paper this is regularly not done. This therefore means that the amount of trees and forests
are decreasing rapidly.

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In figure 1 we are shown the amount of forests there were in 8000BC. As you can see plays
in Europe like the United Kingdom were full of forests all over but then in 2000CE it's completely
different and not one part of the UK is shaded green. Large proportions of greenery in Australasia
have also been lost. Since the year 2000 Brazil has lost 150,000km2 of tropical rainforests to
deforestation.…read more

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Inorganic fertilisers are very soluble in water and, when present in excess, are readily
leached from the soil and find their way into the water courses. The enrichment of aquatic enrichment
of aquatic environments by nutrients such as nitrates and phosphate is known as Eutrophication.
Levels of Eutrophication have significantly increased as a result of intensive farming and there levels
are having a damaging effect on the environment.
Nitrates and phosphates from excess fertilises leach into waterways.
Algae and water plant populations increase rapidly.…read more

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Gases like carbon dioxide and nitrous oxide can sometimes trap energy from the sun; the
means there is a rise in the temperatures on earth leading to the Greenhouse Effect. But if we did not
have these gases we would suffer; heat would escape out into spaces and the Earth's average
temperature would be 60*F colder than it is today. These gases are named as the "greenhouse
gases" because of they keep our world warm. In winter greenhouses are used to grow plants.…read more

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To conclude, there are many way in which human activity influence the environment. They
way we influence our surroundings is often bad, causing much pollution to the world we live in.
Burning fossil fuels, deforestation and the Greenhouse Effect are a few which are very harmless to
Earth. If Green party were surprisingly voted in one year I'm sure there would be a huge change to
the way we live. Perhaps we each household would have just one car.…read more



A beautifully detailed set of notes on not only deforestation but acid rain, water pollution and the greenhouse effect. These would be useful for any student studying these topics for their specification. 

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