Suggest four ways in which a city can reduce its air pollution.

Public transport can be improved and the use of private vehicles reduced. Vehicles can be required to meet emission standards and to use cleaner fuels such as compressed natural gas. Industries can be moved out of residential areas and fitted with scrubbers and electrostatic precipitators. Planting trees along roads and in parks helps absorb pollutants and dust.

No citable source has been recorded for this record. Treat it as practice material, not as fact.

Explanation

Switching electricity generation away from coal has the largest single effect.