The atmospheric concentration of ________ has increased by more than 25 percent in the past century,due largely to the burning of fossil fuels.
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Q1: Plants exposed to higher atmospheric carbon dioxide
Q3: Which of the following gases in the
Q4: Recent analyses of daily maximum and minimum
Q5: According to general circulation models,warming is expected
Q6: Samples of pollen taken from _ cores
Q7: Decomposition proceeds faster under warm and _
Q8: General circulation models consistently predict an increase
Q9: Atmospheric scientists have developed complex computer models
Q10: _ levels were about 100 meters lower
Q11: The absorption of thermal (long-wave)radiation emitted by
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