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dang qian quan qiu huan jing zhuang kuang
Author(s): 
Pages: 34-36
Year: Issue:  3
Journal: Journal of Subject Education

Abstract: 当前全球环境状况长安1、大气质量(1)全球性大气环境问题在世界大多数国家,空气污染已成为一个重大的环境问题,损害着人类的健康,妨碍着农业、森林的发展和成长,破坏着水源、建筑物和设备等等,人类为此而付出的代价是很高的。例如,据估计,在美国由于空气污染,...
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