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 causes harm to the environment or the inhabitants of the environment.There are many kinds of pollution,and there are many pollutions.Some obvious kinds of pollution are pollution of air,soil,and water.Some less obvious,or less salient,kinds of pillution are radioactive,noise,light pollution,and green-house gasses.