Scientists claim that air pollution causes a decline
in the world’s average air temperature. In order to prove that theory,
ecologists have turned to historical data in relation to especially huge
volcanic eruptions. They suspect that volcanoes effect weather changes that are
similar to air pollution. One source of information is the effect of the eruption of Tambora, a volcano in Sumbawa, the Dutch East Indies, in April 1815. The largest recorded volcanic eruption, Tambora threw 150 million tons of fine ash into the stratosphere. The ash from a volcano spreads worldwide in a few days and remains in the air for years, It’s effect is to mm incoming solar radiation into space and thus cool the earth. For example, records of weather in England show that between April and November 1815, the average temperature had fallen 4.50 ℃. A. of several days’ duration worldwide B. felt mainly in the Dutch East Indies C. evident in the decreased world temperature D. immediately evident to the world’s scientists [单项选择] {{B}}Text 1{{/B}}
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