Current, greenhouse gas of China discharges gross to reside the world the 2nd, predict to was controlled 2020, greenhouse gas only discharge capacity of China will be caught up with and exceed the United States. The United States rejects to approve " Kyoto protocol " one of excuse, it is protocol without the regulation the main developing country such as China, India, Brazil assumes greenhouse gas to reduce an obligation. Because this is after 2012, china meets what be made clear by demarcate extremely likely reduce a quota, to in those days, carry out the structure that reduces a platoon to still can produce change possibly, our country buys carbolic index likely also in abroad, carbon is begun likely also to trade between domestic company.