Mans Effect On The Environment


Man’s Effect on the Environment
Freshwater Environments : Man pollutes freshwater all over the world in many ways there is much waste and pollution that ends up in rivers.
One of the main hazards is called eutrophication, this process becomes enriched with artificial nutrients from fertilisers which run off into the rivers and upset the natural nutrient cycle of the river, lake or pond. The water turns green because of the algae which when they die multifly using up all the oxygen.
Similar consequences occur if raw sewage is pumped into a river.
Chemical waste from factories dump their un wanted waste into rivers, lakes or ponds as well. One major component that effects the water ...

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on the local environments. Oil is extremely dense which means it floats on top of the water and can kill fish and birds, ruin beaches but nothing as yet has been invented to deal with this major problem. Dangerous metals such as mercury, arsenic and lead are also dumped into the sea. All of these examples have the ability to kill and damage the environment around it.


Agricultural Environments : Unwanted plants or insects are nowadays killed with by herbicides and insecticides, in this case chemical rather than biological are used. Pesticides have the ability to damage the local environment, while herbicides may kill wild flowers as well as weeds and insecticides may kill

Kris Charik R10D

harmful pests but it can also kill butterflies and moths. Some of these chemicals are even dangerous to humans as well.



2) FIVE MAJOR POLLUTANTS:

SULPHUR DIOXIDE

Sulphur Dioxide comes from both car and factory emissions.
Sulphur Dioxide is a poisonous gas which can ...

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also use cleaner power such as Hydro and Nuclear which would also reduce the amount of harmful emissions given off.



3) ATMOSPHERE POLLUTION :

Global warming: Green house gases include : Carbon Dioxide released from
Combustion fossil fuels, Methane produced from ruminants- released from gut into atmosphere and CFC’s from aerosol cans. These gases which are infrared radiation are reflected toward’s the earth’s surface, this hot air becomes trapped in our troposphere creating global warming.

Because of global warming: -
High winds heavier rains
Polar ice caps melting and causing sea levels to rise.
Water evaporates from fertile area – crop losses
Extended range of ...

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PAPER DETAILS
Added: 6/5/2004 04:01:26 AM
Category: Science & Nature
Type: Premium Paper
Words: 2105
Pages: 8

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