Question

question 18 which outdoor air pollutant comes from using aerosols? chlorofluorocarbons ozone lead carbon monoxide

Explanation:

Aerosols historically contained chlorofluorocarbons (CFCs) which are harmful outdoor air pollutants. Ozone is formed through photochemical reactions, lead comes from sources like lead - based paints and old gasoline, and carbon monoxide is produced by incomplete combustion.

Answer:

Chlorofluorocarbons