Coal use has fallen in the US, but it remains in high demand elsewhere in the world.
America's Dirtiest Power Plants
Big Coal in big trouble as coal production costs rise
Clean coal's dirty secret: More pollution, not less
Just 5 Percent of Power Plants Release 73 Percent of Global
Dirty Coal Production Around the World
List of countries by coal production - Wikipedia
Coal - Greenpeace USA
Chart: Fossil Fuels: Dirty But Necessary?
Expensive and very dirty BNEF slams Japan's plans to burn