If we're eventually going to close the carbon cycle, it would be extremely stupid to go e.g. polyethylene -> CO2 capture from flue gas -> ethylene synthesis wit

If we're eventually going to close the carbon cycle, it would be extremely stupid to go e.g. polyethylene -> CO2 capture from flue gas -> ethylene synthesis with H2 -> polyethylene. Sorting out the plastic and doing stuff like anaerobic thermochemical conversion is way more efficient. No need to get the oxygen involved.