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Would some degree of warming be bad for most societies and natural environme
Would some degree of warming be bad for most societies and natural environme
游客
2023-08-29
36
管理
问题
Would some degree of warming be bad for most societies and natural environments? "During the 20th century, " writes Dr. Patrick Michaels, "we have already proceeded more than half way to doubling the natural carbon dioxide greenhouse effect. Here is what resulted: Life expectancy doubled in the free and developed world. The developing world is catching up as their emissions rise. Corn production peracre increased fivefold. The growing season in the coldest latitudes increased slightly, but enough to increase greenness by 10 percent. "
The small amount of warming that occurred during the past century consisted primarily of increased minimum temperatures at night and during winters. This means higher average temperatures, should they occur, would not result in more daytime evaporation, which some claim would lead to droughts and desertification. Warmer winters would mean longer growing seasons and less stress on most plants and wildlife, producing a substantial benefit for the global ecosystem. Finally, past warming has been accompanied by increased cloudiness, a phenomenon also predicted by most global climate models. This means a warmer world would probably be a wetter world, which once again would be beneficial to most plant and animal life.
Ex-Vice President Al Gore claimed that " hundreds of millions of people may well become even more susceptible to the spread of diseases when populations of pests, germs, and viruses migrate with the changing climate patterns". Gore has also claimed that global warming will cause floods, droughts, heavy rainfall, forest fires, retreating glaciers, and heavier snowfall. In addition to often being at odds with each other, Gore’s claims are at odds with most scientific research. The two historical epidemics described by Gore to validate his prediction were unrelated to climate change. The Black Death, for example, was transmitted by rats, which flourish in cool as well as warm climates. Cholera has been a threat in warm as well as cold climates, and is readily brought under control by treating water supplies with chlorine(氯).
The latest research suggests that sea levels would decline, not rise, if temperatures rise, due to increased evaporation from the oceans and subsequent precipitation over land. Increasing polar temperatures by a few degrees would not cause ice or snow to melt because the original temperatures are so low that an increase of a few degrees would leave them well below freezing. The IPCC itself found " inadequate data to determine whether consistent global changes in climate variability or weather extremes have occurred over the 20th century," with some regions exhibiting greater variability and others less. In short, a slightly warmer world would probably be greener and a little cloudier than our world today, but otherwise not much different. [br] The author’s intention in writing this passage is to tell us that______.
选项
A、our world is becoming warmer and warmer
B、we should take measures to control global warming to save our world
C、global warming is threatening our lives
D、a slightly rising of temperature wouldn’t ruin our life
答案
D
解析
主旨大意题。文章末段末句表明了作者对全球变暖的态度是:轻微的变暖只会使我们的世界越来越好,而且作者在前面也批判了Gore的过度担心是没有必要的。故选[D]。
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