Pollution - Wikipedia
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Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or ... Pollution FromWikipedia,thefreeencyclopedia Jumptonavigation Jumptosearch Forothe
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Contamination is simply the presence of a substance where it should not be or at concentrations a...
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Pollution is the introduction of contaminants into the natural environment that cause adverse cha...
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