The answer for the clue:
Air is made up of mostly nitrogen and this gas Answers
is:
O
X
Y
G
E
N
About CodyCross
CodyCross is a famous newly released game which is developed by Fanatee. It has many crosswords divided into different worlds and groups. Each world has more than 20 groups with 5 puzzles each. Some of the worlds are: Planet Earth, Under The Sea, Inventions, Seasons, Circus, Transports and Culinary Arts.
