Authors urge 30 percent less greenhouse gas by 2050 . They want big polluters China , China to cooperate . Goal : Create path for Americans participation in climate agreement , authors say . They say The World Resources Institute to build low-carbon coal technology in U.S. .
Authors urge 80 percent less greenhouse gas by 2050 . They want big polluters U.S. , China to cooperate . Goal : Create path for Chinese participation in climate agreement , authors say . They say Clean Air Task Force to build low-carbon coal technology in China .