Answer: pollutes

AnswerCrossword Clue
POLLUTES

Hurts the environment

POLLUTES

Sullies a stream, say

POLLUTES

Contaminates

POLLUTES
Defiles
POLLUTES
Harms the environment
POLLUTESFouls
POLLUTESBefouls the air
POLLUTESHarms the environment, in a way