I read an article the other day (on mpbile so Ill edit in a link at home later) about how China set a goal to reduce carbon emissions. And so far have hit an 8% reduction in their total emissions in four months. Which sounds fantastic. In the grand scheme of things China is going to be hit the worst by changing climates, since most of their cities are coastal. Authoritarian regimes are awful, but if they set out to do something they'll get it done (by whatever means nessecary, which isn't exactly a good thing) so at least the global benefit outweighs that, in my opinion.
I can't see how a country with an economy that size could cut their emissions by 8% in four months by implementing new policies. It doesn't add up. I've been to China several times over the last 14 years, and although I agree that they do things big. I cannot see such an effort being successful, they have a powerful culture of shirking government directives.