The 20 hottest years on record have occurred after ____.
A) 1960
B) 1980
C) 1970
D) 1990
Correct Answer:
Verified
Q16: The past 10,000 years, during which civilization
Q17: Marine organisms absorb calcium and carbonate ions
Q18: The thawing of permafrost can release the
Q19: Tree rings _ during unfavorable years.
A) record
Q20: Methane gas is stored in sea-floor sediments
Q22: The four industrial greenhouse gases are _.
A)
Q23: When water evaporates from the ocean surface,
Q24: During the process of photosynthesis, the compound
Q25: Water molecules containing 16 O
Q26: Most thick limestones formed in _ seas.
A)
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