Contamination of the Environment, E.g. by Vehicles
Puzzle 17 of Thanksgiving Piece of Cake Pack
Question is: Contamination of the Environment, E.g. by Vehicles
and the answer is: POLLUTION
Word Meaning:
POLLUTION — Physical contamination, now especially the contamination of the environment by harmful substances, or by disruptive levels of noise, light etc.
Definitions from Wiktionary.