A solution to keep coal going in Wyoming

Some time ago I had a discussion on Microbial Coal Conversion. The idea was to inject special microbes into coal reserves that under certain conditions would produce methane gas from the coal which then could be lifted and used like any other Natural Gas. That leaves the nasties in the soil and allows in situ conversion of coal. I am not a scientist so i do not know for certain if the process works as explained and also what the financials behind it are but it made a whole lot of sense to me. Does anyone push this further?

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