Medical Geology,the emerging discipline that focuses on the health impacts of geologic materials and geologic processes,has its roots in Guizhou Province,China.In the 1980 s Prof.Zheng Baoshan and his students recognized that a large number of people in Guizhou Province had clinical symptoms of arsenic poisoning,fluorine exposure,selenosis,and other diseases caused by exposure to potentially toxic trace elements or due to deficiency of essential elements.Their publications and invitations to scientists to visit the Province ultimately resulted in increased attention to the health impacts of the natural environment and the formation of scientific societies,the publication of at least a dozen books,and thousands of technical articles on what is now called Medical Geology.
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