thick black smoke curling out of smokestacks,horrible-tasting chemicals in your drinking water,pesticides in your food-these are examples of pollution.
Pollution is any contamination of the environment which cause harm to the environment or the inhabitants of the environment.
There are many kinds of pollution,such as air,soil,and water.
soil pollution can be caused by pesticides,leakage from chemical tanks,oil spills,and other chemicals which get into the soil by dumping or accidental contamination.
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water pollution can be caused by waste produce,sewage,oil spills,and litter in streams,rivers,lakes,and oceans.
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radioactive pollution can be caused by leaks or spills of radioactive materials.
these materials can come from medical sources,nuclear power plans,or laboratories which handle radioactive materials.