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  3. 　　Humans are having a hard enough time coping with the natural variability in our environment，which causes disasters such as hea

　　Humans are having a hard enough time coping with the natural variability in our environment，which causes disasters such as hea

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问题 　　Humans are having a hard enough time coping with the natural variability in our environment，which causes disasters such as heat waves，wildfires and floods．Waiting without actions makes all three of those problems——and many more——worse．
    That was the serious warning from the world’s scientific community last week，in the latest report from the Intergovernmental Panel on Climate Change(IPCC)．The U．N．-chartered body produced its first comprehensive report since 2007 on the climate changes．
    There are some things the scientists are very confident will happen in a warming world over the next century．Sea levels will rise，threatening coastal cities and low—lying nations．Island states could get hit very hard．There are probably going to be relatively more extremely hot days than extremely cold ones，and food—borne illnesses will probably increase．
    But part of the risk of climate change is that scientists don’t have a crystal ball to foretell how，exactly，the environment will respond to rising temperatures，and they are trying to predict effects over the course of decades．The experts anticipate that forests could die off and that wetland and rain forest ecosystems could crumble．They anticipate effects on water systems just about everywhere：more flooding in many places，less water in dry areas，more humidity inhibiting human labor in wetter climes．
    There could also be some positive effects for some，the experts note．They predict fewer deaths due to cold，but more due to heat．Some areas of the planet，particularly in higher latitudes，might become more fertile．But lower crop yields elsewhere will outweigh those benefits．Indeed，the planet’s green lands along the equator might be much worse off．The scientists，for example，predict that fish and other aquatic life will flee elsewhere as ocean temperatures change．And，of course，there could be effects，good and bad，that the experts aren’t anticipating．That shouldn’t be comforting．
    The experts leave little doubt about the right response：Cut pollution to head off the worst possible consequences and prepare for the risks the world is unlikely to avoid，given its inability to slash emissions quickly．Delaying action，they note，reduces the world’s options and affords vulnerable people less time to cope．Isn’t it time we did something？
What positive result will climate change cause？
选项 A、There will be fewer deaths due to climate change．
B、Areas in higher latitudes may become more suitable for plants’ growth．
C、Plants in lower latitudes may grow even more luxuriant．
D、Cities in dry areas will have enough water resource．
答案B
解析 细节题。根据题干关键词定位到第五段。由Some areas of the planet，particularly in higher latitudes，might become more fertile可知，B项“高纬度地区将更适合植物的生长”为正确答案。A项“由于气候变化，死亡将大大减少”与段中They predict fewer deaths due to cold，but more due to heat，描述不一致，气候变热还是变冷对于死亡的影响是不同的。C项“低纬度地区的植物将更加茂盛”与段中Indeed，the planet’s green lands along the equator might be much worse off相矛盾。D项“干燥地区将有充足的水资源”与第四段中的more flooding in many places，less water in dry areas相矛盾。故本题选B。
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