How many years do CFCs take to reach the stratosphere?
A) 1 to 2 years
B) 5 to 10 years
C) 10 to 20 years
D) 20 to 30 years
Correct Answer:
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Q46: Which of the following is characteristic of
Q47: Which substance is non-destructive in the ozone
Q48: Which strategy was proposed in the 1997
Q49: Which product does NOT use chlorofluorocarbons in
Q50: Which of the following is characteristic of
Q52: What fraction of the world's cumulative CO₂
Q53: What is the current situation with the
Q54: How many years elapsed between the scientific
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Q56: Which term applies to chlorofluorocarbons?
A) flammable
B) nontoxic
C) odorous
D) corrosive
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