Carbon __; Greenhouse Gas in the Atmosphere
This page is the CodyCross answer for the clue below from Pet Shop, Group 356, Puzzle 3 (Clumping Litter).
Question is: Carbon __; Greenhouse Gas in the Atmosphere
and the answer is: DIOXIDE
Word Meaning:
DIOXIDE — (chemistry) Any oxide containing two oxygen atoms in each molecule.
Definitions from Wiktionary.