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本帖最后由 细胞海洋 于 2013-8-27 11:14 编辑 , m8 J0 q- z5 E3 D0 w2 U7 b7 q
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COVER Partial view of the predictive map of high levels of arsenic in groundwater resources in China (blue, low probability; red, high probability; width, 600 kilometers; resolution, 1 square kilometer). Chronic arsenic poisoning from contaminated groundwater is a major health problem in many parts of China. An estimated 19.6 million people are potentially exposed to elevated arsenic concentrations in their drinking water. See pages 852 and 866. Image: Luis Rodríguez-Lado and Michael Berg, Eawag % ^. n3 h; f4 }: i0 z0 r
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