Petroleum and coal are referred to as fossil fuels, which supposedly means they started out as biological materials. They didn't. Oil and coal are in a higher state of chemical energy than biological materials. They are often called hydrocarbons, because they have hydrogen attached to carbon, which is a high energy state. Biological materials have a lot of oxygen added, which is a lower energy state. There is no method of increasing chemical energy other than through radiation. Commentators blissfully mention heat and pressure. Those forces cannot increase chemical energy, because they act upon nuclei, while chemical energy is in electrons which spin around nuclei. No force acting upon nuclei can increase the motion of electrons which orbit them short of a nuclear reaction. It means physicists don't know what chemical energy is english.pravda.ru/science...124459-science_corrupt-0/
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