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Well, in factorys, cars, ect. smoke comes out and pollutes the air, which goes to oceans, lakes seas, ect. In water, there can be many bacteria that you can't see, like in furniture and other stuff. To not prevent unclean air, do not pollute!! To make sure you don't drink unclean water, don't drink out of rivers, streams, rain, lakes, ect!

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16y ago

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