PASSAGE TWO What does Claussen think to be the main cause of the increased vegetation in deserted areas?

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问题 PASSAGE TWO
What does Claussen think to be the main cause of the increased vegetation in deserted areas?

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答案Hotter air has more capacity to hold moisture.

解析 根据第4段第3句可知,植被大面积增长有可能是因为空气变热后,得以携带更多的湿气(more capacityto hold moisture),继而可以转化为更多的雨水;第5段克劳森又指出空气携带水分的能力(water-holdingcapacity)是这个变化最主要的驱动力,故答案为Hotter air has more capacity to hold moisture。
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