In june 2004 , the pilot work of the 4 provinces and 3 cities , as well as hua neng group , was evaluated and approved by sepa 2004年6月四省三市和華能公司的示范工作均通過國家環(huán)保總局驗收。
In march 2002 , sepa and environmental defense cooperated in launching the " 4 + 3 + 1 " project , an endeavor to initiate an integrated tec and emissions trading policy in the provinces of shandong , shanxi , jiangsu and henan and the cities of shanghai , tianjin and liuzhou , along with the china hua neng group 2002年3月,國家環(huán)境保護總局發(fā)環(huán)辦函[ 2002 ] 51號文,決定與美國環(huán)保協(xié)會一起,在山東省、山西省、江蘇省、河南省、上海市、天津市、柳州市以及中國華能集團公司開展“推動中國二氧化硫排放總量控制及排污交易政策實施的研究項目” (簡稱“ 4 + 3 + 1 ”項目) 。