solarpunk memes

I'm not sure what you're trying to convey here. Carbon sequestration is unarguably a way to mitigate climate change, and sequestration of CO~2~ is probably the most reasonable way to do so. It doesn't need to be as a gas, as taking CO~2~ and exposing it to various oxides creates carbonates, which are generally very stable compounds like limestone.

The other commenter simply said carbon could be captured as CO~2~ and sequestered without being reduced, which is absolutely true and frankly makes much more sense from a physics/thermodynamics POV.