Question

1. The presence of chemicals in the air in quantities harmful to human health and the
environment _​

Answer 1

Answer:

Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials.

Answer 2

Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials.