Multiple Choice
The gas(es) that has/have the greatest relative contribution to increasing the greenhouse effect is/are:
A) carbon dioxide (CO₂) .
B) chlorofluorocarbons (CFCs) .
C) methane (CH₄) .
D) nitrous oxide (N₂O) .
E) ozone (O₃) .
Correct Answer:

Verified
Correct Answer:
Verified
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