The document describes 5 air pollutants, identifying their effects, sources, and properties. Carbon monoxide causes brain damage and death, comes from vehicle exhaust, and is a colorless, poisonous gas. Oxides of nitrogen cause breathing problems from vehicle exhaust and are poisonous gases. Sulfur dioxide causes irritation and comes from power plant fumes as a poisonous gas. Carbon dioxide causes ozone layer depletion from any burning and can be absorbed by plants. Lead compounds cause brain damage, especially in young people, from vehicles using leaded petrol and are solid particles.
