Litter and Smog
This page is the CodyCross answer for the clue below from Brazilian Tour, Group 764, Puzzle 2 (Paulo Coelho).
Question is: Litter and Smog
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.