I don't think they're equal (left and right's responsibility and effective outcomes against the relative CO2 emissions), but I won't bother arguing that because there's plenty of the internets to do that elsewhere.
What I will say is that I don't think it's correct to compare China and the entire West's percentage of CO2 emissions. It is smarter to focus on reducing emissions in your own country and be a leader in doing so, regardless of that. The technology will slowly but steadily build up to make it more efficient. The costs will go down in the long term, even if they are expensive in the short term.