本帖最后由 细胞海洋 于 2013-8-27 11:14 编辑 ) t7 B" i8 ~' |! A8 F0 {6 K; ~2 O* {1 F e* `! a/ j n
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 & L2 _. {" S7 X3 O( S. F! ~) m% L5 ^) p: B" O5 h" w0 c- j
4 Y9 q2 b0 {# T4 V 作者: xiacl9988 时间: 2013-8-26 14:24