By now, we've all heard the same merry-go-round arguments about why the U.S. can't afford aggressive measures to develop clean energy and tackle climate change. And most of those arguments revolve around that other behemoth-of-a-superpower: China. We can practically roll the stats off our tongues: China's now the #1 emitter of greenhouse gases. China is building one coal-fired power plant a week. If China doesn't clean up its act, why should we?