The amount of which gas is growing continuously? (a) Argon (b) Neon (c) Krypton (d) Carbon dioxide

The amount of which gas is growing continuously? (a) Argon (b) Neon�

1.	The amount of which gas is growing continuously? (a) Argon (b) Neon (c) Krypton (d) Carbon dioxide
Answer» (d) Carbon dioxide