Chemistry, 06.05.2020 03:59 stressedmolly8387

If you get some of the right sort of organic material, and heat it in the right sort of way, perhaps with a little squeezing, you will end up with coal. The most-heated is the most valuable. In order, from the MOST-VALUABLE/MOST-HEATED (FIRST) to the least-valuable/least-heated (LAST), the coals (and material that gives coal) are:

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If you get some of the right sort of organic material, and heat it in the right sort of way, perhaps...