a slight short-term increase in atmosphere water vapor content
24. The author refers to Venus primarily in order to
show the inherent weakness of the greenhouse effect theory
show that the greenhouse effect works on other planets but not on Earth
show the extent to which Earth s atmosphere differs from that of Venus
support the contention that as water vapor increase, the amount of CO2 increases
support the argument that the CO2 level in the atmosphere has a significant effect on climate
25. The passage suggests that if there were a slight global warming at the present time, it would be
easy to measure the exact increase in temperature because of the abundance of temperature recording stations throughout the world
difficult to measure the increase of CO2 in the atmosphere because of local variations in amounts
easy to demonstrate the effects of the warming on the water vapor in the atmosphere
difficult to prove that the warming was caused by the burning of fossil fuels
easy to prove that the warming was caused by an increase of cloud cover
26. The discussion of climate in the passage suggests which of the following conclusion?
I. Climate is not perfectly stable, and slight regional temperature variations can be considered a normal feature of the environment.
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