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pollution British & World English

The presence in or introduction into the environment of a substance which has harmful or poisonous effects

pollution English Thesaurus

pollution caused by vehicle emissions

air pollution British & World English

The presence in or introduction into the air of a substance which has harmful or poisonous effects

light pollution British & World English

Brightening of the night sky caused by street lights and other man-made sources, which has a disruptive effect on natural cycles and inhibits the observation of stars and planets

noise pollution British & World English

Harmful or annoying levels of noise

genetic pollution British & World English

The spread of altered genes from genetically engineered organisms to other, non-engineered organisms, especially by cross-pollination