Multiple Choice
If CFCs have not been widely used since the late 20th century, why are they considered a major greenhouse gas in the 21st century?
A) Although they have been banned, they are being use illegally
B) CFCs are released by a number of natural processes, such as volcanoes
C) Greenhouse gases such as methane will break down into CFCs
D) CFCs can stay in the atmosphere for decades
Correct Answer:
Verified
Correct Answer:
Verified
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