Longman Dictionary of Contemporary English homepage

pollutant

 noun
     
Related topics: Geography
pol‧lut‧ant [countable]
SG a substance that makes air, water, soil etc dangerously dirty, and is caused by cars, factories etc
air/environmental/water etc pollutants
New regulations will reduce hazardous air pollutants.
a dumping ground for toxic pollutants
chemical/industrial etc pollutants
industrial pollutants in the lake
Definition from the Longman Dictionary of Contemporary English
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