What is the status of fluorosis caused by coal burning pollution in Henan Province?

The degree of harm is significantly reduced. Understand the current status of endemic fluoride caused by coal burning pollution in Henan Province to provide basis for the prevention and control of ground fluorosis. In 2006 and 2007, a census was conducted on coal burning conditions, living habits, staple food, housing structure, water fluoride and other factors in 1,832 villages with historical coal-burning pollution-type ground fluorosis disease areas in 13 counties in Henan Province. The conclusion was that coal-burning pollution in Henan Province The scope of type fluorosis disease areas has been greatly reduced, and the degree of harm has been significantly reduced.