From the Financial Times (link):
Mass quantities of air pollutants from China, including mercury discharged from traditional coal-fired power plants, are travelling to places as far away as the US, according to the US environment agency.
“That is the most direct impact [of China’s pollution] on the United States,” Stephen Johnson, head of the US Environmental Protection Agency, told the FT. Mr Johnson said the EPA had traced high levels of “mercury deposition” in the US to China and India. Mercury is a highly-toxic heavy metal that damages the human nervous system.
