Bicycles are a form of transportation that provides exercise and does not emit pollution.

Car exhaust causes serious pollution in towns.

The Waterfront's success could mean that other cities soon follow, creating areas that offer people a new kind of city living, with all the benefits and none of the stress, noise and pollution of crowded centres.

Biden pledged during the summit to cut U.S. greenhouse gas pollution by 50-52% by 2030.

The world is confronted with the problem of environmental pollution.

Her latest book deals with pollution.

It is concerned with air pollution.

The result of the poll will be known soon.

The factory waste gave rise to serious environmental pollution.

They closed every polling station within a 48-kilometer radius.