No country except the U.S. is crawling with more venture capitalists looking to fund green-energy deals these days than China. The rush has not yet reached dotcom-boom proportions, but VCs and entrepreneurs see big opportunities in helping the country cope with its horrendous pollution problems through alternative-energy development. Deals are getting done. China is applying green principles to the construction of entirely new cities such as Dongtan, an area outside of Shanghai the size of Manhattan, which will use recycled water only and generate electricity using biomass. Last year, 3.4 gigawatts (GW) of wind energy were added to China's...