Contaminant, Such as Chemical Waste in Rivers
This page is the CodyCross answer for the clue below from Welcome to Japan, Group 575, Puzzle 1 (Bullet Train).
Question is: Contaminant, Such as Chemical Waste in Rivers
and the answer is: POLLUTANT
Word Meaning:
POLLUTANT — A foreign substance that makes something dirty, or impure, especially waste from human activities.
Definitions from Wiktionary.