What are the steps in the process that takes place as CO2 absorbs long-wavelength radiation?
How might our understanding of the greenhouse effect be improved if the burning of fossil fuels were decreased?
What might cause a series of regular increases and decreases in the amount of CO2 in the atmosphere?
Why are there fewer meteorological recording stations in the Southern Hemisphere oceanic zone than elsewhere?
22. The author is primarily concerned with
explaining the effects that the burning of fossil fuels might have on climate
illustrating the effects of CO2 on atmospheric radiation
discussing effects that changes in the CO2 level in the atmosphere might have on climate
challenging hypotheses about the effects of water vapor and CO2 on climate
refuting hypotheses by climatologists about the causes of global temperature fluctuations
23. The passage suggests that a large decrease in the amount of CO2 in the atmosphere would result in
at least a slight decrease in global temperatures
at the most a slight increase in short-wavelength radiation reaching the Earth
a slight long-term increase in global temperatures
a large long-term increase in the amount of volcanic activity
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