2. How does air get polluted?
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Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. ... Air pollution isn't just outside - the air inside buildings can also be polluted and affect your health.
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Anything that people do,involving burning things(combustion),release of toxic gases into the atmosphere from the factories and even the pollutants released from vehicles cause air pollution.
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