Not emitting it won't fix the fact that we have already emitted tons of it. And there's the potential feedback loop from methane release from the Arctic and Sib

Not emitting it won't fix the fact that we have already emitted tons of it. And there's the potential feedback loop from methane release from the Arctic and Siberia, which would require active measures to stop it once it gets going (capturing greenhouse gasses or blocking light). Obviously though, you can't have CCS instead of green energy. You need surplus green energy to power it with, otherwise you're not really accomplishing anything.