Building up alternative energy is a work in progress for anyone, they're leaders on electric cars which is good but they won't get off coal until they (or someone) figures out managing a grid with 80%+ of mostly-intermittent inputs from wind and solar.
[1] Not really, for the same reason as the legislatures, it's horrible politically. Dictatorships and especially the Chinese system have broader bases of support and political activity than most American media discourse assumes.