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    Fill the coal mines - with coal!
    2 months agoopen2
    We have been digging huge holes into the country side mining coal. Now, CO2-levels in the atmosphere have risen so far that we will need to actively remove some CO2 from the atomsphere to stop the earth from overheating. It's time to fill up those mines again - with coal! Let's use plants that absorb a lot of CO2 very quickly, pyrolyse them to turn them into biochar, and fill those holes up again! Unlike some others, this solution does not require specific geology to work.