air pollution | Effects, Causes, Definition, & Facts | Britannica

Definition. Air pollution can be defined as the presence of toxic chemicals or compounds (includi...

Air pollution is the presence of substances in the atmosphere that are harmful to the health of ....

Air pollution, release into the atmosphere of various gases, finely divided solids, or finely dis...

Air pollution refers to any physical, chemical or biological change in the air. It is the contami...

Air pollution has been defined as the unwanted introduction of particulates, gases and aerosols i...