他们发现，在全球平均范围之上，16%的土地表面变暖是由植物蒸发作用引起的，而剩下的是由温室效应引起的。
They found that, averaged over the entire globe, the evapotranspiration effects of plants account for 16% of warming of the land surface, with greenhouse effects accounting for the rest.
如果没有温室效应释放二氧化碳和水蒸气以起到保温作用，地球就会凝结成固体。
Without the greenhouse gases carbon dioxide and water vapor to trap heat, for example, Earth would be frozen solid.
自然演变和导致温室效应气体的排放(这导致了全球温度的升高)似乎共同作用，使大量北冰洋海冰融化。
Natural variability and greenhouse gas emissions (and the resulting rise in global temperatures) likely worked together to melt greater amounts of Arctic sea ice.
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