Of the following greenhouse gases, which have actually decreased in atmospheric concentrations during the past 30 years?
A) methane (CH₄)
B) carbon dioxide (CO₂)
C) chlorofluorocarbons (CFCs)
D) nitrous oxides (N₂O)
Correct Answer:
Verified
Q49: Q50: How is ocean acidification possibly linked to Q51: Which of the following is not a Q52: The world's largest reserve of carbon-based fuel Q53: Present atmospheric methane (CH₄) concentrations are at Q55: Fossil fuel burning accounts for over _ Q56: How have scientists used isotopic analysis to Q57: Since 1880, the two years with the Q58: Radiative forcing (climate forcing) refers to Q59: During the last 800,000, climate reconstructions show
A) the
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