36. It can be concluded that a concentration of carbon dioxide in the atmosphere would ________.
[A] prevent the suns rays from reaching the earths surface
[B] mean a warming up in the Arctic
[C] account for great changes in the climate in the northern hemisphere
[D] raise the temperature of the earths surface
37. The article was written to explain ________.
[A] the greenhouse effect
[B] the solar effects on the earth
[C] the models of solar-weather interactions
[D] the causes affecting weather
38. Although the fuel consumption is greater in the northern hemisphere, temperatures there seem to be falling. This is ________.
[A] mainly because the levels of carbon dioxide are rising
[B] possible because the ice caps in the poles are melting
[C] exclusively due to the effect of the inertia of the earths climate
[D] partly due to variations in the output of solar energy
39. On the basis of their models, scientists are of the opinion that ________.
[A] the climate of the world should be becoming cooler
[B] it will take thousands of years for the inertia of the earths climate to take effect
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