Answer: pollute

AnswerCrossword Clue
POLLUTETaint.
polluteDefile; corrupt
polluteContaminate (water, air, or a place) with harmful or poisonous substances
polluteto make unclean or impure
POLLUTERisk the wrath of the EPA
POLLUTEWhat boomboxes do w-noise
POLLUTEFoul the water, e.g.
POLLUTEDirty
POLLUTEAdd debris
POLLUTEMake unclean
POLLUTECorrupt
POLLUTEBefoul
POLLUTE"Give a hoot, don't ..."
POLLUTEDesecrate.
POLLUTERender unfit to drink.
POLLUTEWhat Woodsy Owl asked you not to do
POLLUTEContaminate, as water
POLLUTETaint
POLLUTEDefile
POLLUTEFoul the air
POLLUTEContaminate
POLLUTEFoul
POLLUTEWhat clean energy doesn't do