Multiple Choice
How close are you to a CFC molecule right now?
A) It depends upon whether you are in an urban or rural setting.
B) There are about 25 trillion of them in each liter of air you breathe.
C) There are about 25 million of them in each liter of air you breathe.
D) There are about 25 of them in each liter of air you breathe.
Correct Answer:
Verified
Correct Answer:
Verified
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