Charleston Gazette: COAL IS a great fuel in many ways – dirt-cheap, powerful and plentiful. I’ve spent many long winter evenings basking in the warmth of Preston County’s finest “black gold” burning in my basement furnace. But coal has one big negative. When you burn coal, it gives off significantly more carbon dioxide than does any other fuel; and CO2 is the main greenhouse gas that causes planetary climate change, also known as global warming. For this reason, essentially all …