本帖最后由 细胞海洋 于 2013-8-27 11:14 编辑 8 U# U9 ]% m. Y9 d1 r. ]7 M% }: L# z: X+ O; g
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 + F0 S4 m; x5 k9 ?( D4 v$ h + x' A" Z; ~ G6 l3 \' s: Z1 ~. M9 j. b 作者: xiacl9988 时间: 2013-8-26 14:24