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I wonder how much use CO2 extracted from the air has. Greenhouse CO2 supplementation sounds interesting but I assume there are cheaper ways to produce CO2 alrea

• Reason077 9y ago
  Presumably, most of the captured CO2 eventually ends up back in the atmosphere anyway - either through leakage, or eventual decomposition of the greenhouse plants being grown. But it's still a net gain if the CO2 would otherwise have come from fossil-derived sources?
  • mattmanser 9y ago
    One of the CO2 trapping strategies would be to grow plants and then bury them to stop it going back.
  • andyjohnson0 9y ago
    Some work has been done on mineralising extracted CO2, ending-up with a stable form that doesn't return to the atmosphere. For example: "... use electrolysis or heat to split common salt, sodium chloride, into hydrochloric acid and caustic soda, then react the soda with the carbon dioxide to make bicarbonate." [1] The obvious question is whether this can be done in an energy neutral way. Either way its just a fix: we need to stop putting the CO2 into the atmosphere in the first place. [1] https://www.theengineer.co.uk/issues/25-april-2011/solid-as-a-rock-mineralising-carbon-dioxide/ https://www.theengineer.co.uk/issues/25-april-2011/solid-as-...
    • rbanffy 9y ago
      > is whether this can be done in an energy neutral way Wind, PV and waves can be employed for this. You don't need a constant supply and can control capture rate to match available energy. For many uses, renewables like these are already perfect.