The known reserves of coal have been looked at or they would not be known. The coal we harvest first is the hard anthracite ore bodies with about 95% carbon. Wikipedia as a source, about 1% of the coal is in this category. Unknown reserves are just that, but will also be likely to be of lesser carbon content and small net volume. The coal mining we do whether long wall mining destroying farms in central/southern Illinois, or mountain top mining in the Appalachian chain, are soft coal. There have been hundreds of mines both surface strip mines and shaft mines that have left behind deposits of marginal coal. From Havre MT to the east all along the Canadian border are deposits of bituminous and lignite based "soft" coal. These, and the coal we are now using from Wyoming Colorado, and Montana are soft coal or intermediate somewhat better coal. Power companies purchase coal that their technologies can fire and meet current regulation. As time goes by we will see fewer of these plants staying in compliance with the coal they can get. I have been in these mines, I have seen them. Read Scientific American, or Science Magazine. Both have articles addressing the issues. My fault for making an allness statement. Jim
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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