Multiple Choice
CO2 is the most important of the greenhouse gasses that we have in our atmosphere.From 2000 to 2012, emissions of CO2 have been _______ in the U.S.and __________ globally.
A) increasing; increasing
B) increasing; decreasing
C) decreasing; increasing
D) decreasing; decreasing
Correct Answer:

Verified
Correct Answer:
Verified
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