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Researches show that about 1.5 million to 2 million people earlier die of air pollution every year in the world,794 variety of wildlife endanger,more than 30 species in 76 family endanger.And this situation is exacerbating...
794 variety of wildlife and more than 30 species in 76 family are endangered. Nowaday this situation is exacerbating...
Chen Yongjun Hou Jiaxi Chen Hongyu Wang Wei