 This is a result of burning fossil fuels.“Because coal is the primary fuel used to power China’s industrial sector, it is responsible for about 40 percent of the deadly fine particulate matter found in China’s atmosphere.”  In January 2013, fine airborne particulates that pose the largest health risks, rose as high as 993 micrograms per cubic meter in Beijing, compared with World Health Organization guidelines of no more than 25.The World Bank estimates that 16 of the world's most-polluted cities are located in China.