Question

what is air pollution?

Answer 1

Air pollution occurs when harmful or excessive quantities of substances including gases, particles, and biological molecules are introduced into Earth's atmosphere. ... Both human activity and natural processes can generate air pollution.

Answer 2

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. ... Air pollution isn't just outside - the air inside buildings can also be polluted and affect your health.....