B1 damage caused to water, air, etc. by harmful substances or waste污染
More examples
The company claims it is not responsible for the pollution in the river.
Car exhaust is the main reason for the city's pollution.
The once azure skies of Athens have been ruined by atmospheric pollution.
The survey shows a link between asthma and air pollution.
Stricter controls on air pollution would help to reduce acid rain.
noun
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