There's a similar idea to gasify old oil and gas wells. This sounds more feasible than doing it with coal though I suppose you could have a blowout. It should b

There's a similar idea to gasify old oil and gas wells. This sounds more feasible than doing it with coal though I suppose you could have a blowout. It should be cheaper too since it uses already drilled wells. https://protonh2.com/protonh2-advances-project-apollo-with-selection-of-epc-partner-and-completion-of-pre-feed-phase/ https://protonh2.com/protonh2-advances-project-apollo-with-s...