(i)

Pollution is the release/presence of harmful substances/radiations into the environment.

(ii)

Major atmospheric pollutants

1. Chlorofluorocarbons/CFCs
2. Sulphur oxide/SO₂/SO₃
3. Nitrogen oxide/NO₂/N₂O₅
4. Lead (II) oxide/PbO
5. Carbon monoxide/CO
6. Smoke/fumes from industries or cars
7. Dust

(i)

Industrial waste is solid (or semi-solid or liquid or gaseous) unwanted material from industrial processes or activity.

(ii)

Ways by which industrial waste could be useful

1. Through recycling
2. Recovering waste for re-use
3. Turning industrial waste into manure
4. Channeling waste watr for agricultural use
5. Treating biomass to become biogas for energy
6. Using husks for making door mats
7. Using watr sachets in making bags
8. Using cocoa husks for making soap
9. Generate income