what is a pollution ?

Pollution is the introduction of contaminants into an environment that causes harm to ecosystem.

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Pollution is a thing that is formed in 4 ways, They are Air,Noise,Soil and Water.
Air-Air pollution is caused by smoke,Like car petrol smoke,Chimnneys, Ciggrate etc.
Noise-Noise pollution is caused by a very hard noise,Like DJ's,Partys etc.
Soil-Soil pollution is happend by a way caused inside soil,Like throw a can in the soil,And if the soil is fertile,The soil becomes un-fertiled. 
Water-Water Pollution is finally caused by oil and garbage, If we through ol and garbage for example in the sea's.

If you want help,Feel free to ask.
-Ritvick

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A pollution is he waste materail that pollutes Air,Soil,Water.

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pollution is the contamination of natural resorces with poisonous or harmful substances.these harmful or poisonouse substance is called pollutants

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Pollution is something that pollutes something like air,soil and water.
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