Question

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. Some air pollutants are poisonous.​

Answer 1

Explanation:

Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. When ozone forms air pollution, it's also called smog. ... Some air pollutants are poisonous.

Answer 2

Explanation:

There are four main types of air pollution 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