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12-04-2017
Biology

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polution in which part of the atmosphere is most deadly to humans

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12-04-2017

Air pollutants. An air pollutant is a substance in the air that can cause harm to humans and the environment. ... Nitrogen oxides (NOx) - NO2 is one of the most prominent air pollutants. ... Chlorofluorocarbons (CFCs) - harmful to the ozone layer

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