The causes Of endemic fluorosis and an effect analysis on lowering fluoride content of a study area in Guang Dong

By researching the enrichment, migration and transformation regularity of fluoride in soil, water and crops at endemic fluorosis areas in Guang Dong. Found the cause of endemic fluorosis and analysis of the pre and post lowering fluoride regularity of dental fluorosis. We believe that the effect of lowering fluoride is obvious and discovered the content of Pb in crops is high at the same time. We make sure the Pb come from coal-fired by researched the Pb-isotope. The high content of Pb has influenced the edible safety of crops severely.