For some extra context here, a lot of this fine particulate matter is not from burning the coal - it's from decaying exposed mine dumps. The wind in Johannesburg blows the fine sand on top of the mine damps into the communities living next to the mine dumps. The article tries to make it out as being just regular air pollution from fossil fuels, but it's many more factors than just that, and fixing the unique problem of mine dumps is probably a lot easier than general air pollution if there was political will to fix it. Which there is not.<p><a href="https://www.theguardian.com/cities/2015/jul/06/radioactive-city-how-johannesburgs-townships-are-paying-for-its-mining-past" rel="nofollow">https://www.theguardian.com/cities/2015/jul/06/radioactive-c...</a>