Question

What do you understand by fixed and mobile sources of air pollution?

Answer 1

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The main source of carbon monoxide in air is vehicle emissions. As much as 95 percent of the carbon monoxide in typical U.S. cities comes from mobile sources, according to EPA studies. ... Nitrogen Oxides: Nitrogen oxides form when fuel burns at high temperatures, such as in motor vehicle engines.

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Answer 2

There are four main types of air pollution sources: mobile sources – such as cars, buses, planes, trucks, and trains.