臭氧层空洞
For example, "empty hole" emerged in ozonosphere, desertification extended, soil and water loss was aggravated, rate of forest cover dropped rapidly and there was crisis of water and abnormal change of climate all over the world.
如臭氧层空洞的出现,沙漠化扩大,水土流失加剧,森林锐减,水资源危机以及近年来全球气候的明显异常。
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