pollution caused by chemicals form car fumes and exhaust smoke from factories is a very serious problem because it leads to the loss of the ozone layer. All of us know that without the ozone layer, not only human beings but also all plants and animals are exposed to dangerous rays from the sun. Even refrigeration and air conditioning system which make our lives more convenient can also have dangerous emissions. They emit poisonous gases into the air that we breathe.The chemicals use for cleaning and the waste from factories go into our water system and pollute the water that we drink and the fish that we eat. They also kill much of the wildlife we depend on food. Some of the pesticides and fertilizers we have sprayed on our crops have been found to be dangerous. This kind of pollution stays in the ground for a very long time.
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