Answer: pollutes

AnswerCrossword Clue
POLLUTESHurts the environment
POLLUTESSullies a stream, say
POLLUTESContaminates
POLLUTESDefiles
POLLUTESHarms the environment
POLLUTESFouls
POLLUTESBefouls the air
POLLUTESHarms the environment, in a way
pollutesPOLLUTE, to make unclean or impure
pollutesDefile; corrupt
pollutesContaminate (water, air, or a place) with harmful or poisonous substances