Question

1. Define air pollution. Describe any four sources of air pollution.
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Answer 1

Answer:

Air pollution is a mixture of solid particles and gases in the air. 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.

Sources-

mobile sources – such as cars, buses, planes, trucks, and trains.

stationary sources – such as power plants, oil refineries, industrial facilities, and factories.

area sources – such as agricultural areas, cities, and wood burning fireplaces.

natural sources – such as wind-blown dust, wildfires, and volcanoes.

Answer 2

Answer:

Air pollution is a mixture of solid particles and gases in the air. 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.

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