Yes some of it is that high but allot of it is as low as 80% carbon. And that is carbon by weight. It doesn't take very much weight much sulfur dioxide (which yes sulfur is in anthracite) to make allot of sulfuric acidAnthracite is 92-98% pure carbon
You never said that at all you said it burnt as clean as ng. Which it does not at all. Have you ever been to a coal town in northern pa where almost everyone is still burning anthracite coal for heat? If not go find a coal town and take a deep breath then tell me how clean it burns.Was never talking about ash disposal, only air quality.
Where is the information to support these claims? It is cleaner that wood and pellets in some ways yes. It does have much less volume of emissions But the emissions it does have are much more harmful,Yes, technically coal is a little less clean than NG, but it is far cleaner than pellets and wood and is by no means the messy dirty pollutant most people make it out to be. Quite the opposite!