Under an announced five-year proposal, China will work to boost energy efficiency, promote low-carbon technology and establish carbon trade markets, the country's state-run news agency Xinhua reported.
"China, as a responsible country, always supports jointly coping with the challenges of climate change through solid and effective international cooperation," said a statement released by the Chinese national leadership team on combating climate change.
China would follow the implementation of the U.N. Framework Convention on Climate Change and the Kyoto Protocol, and promote the principle of "common but differentiated responsibilities," the statement said.
China will cut its carbon intensity by 40 percent to 45 percent by the year 2020 compared with 2005 levels, a target that would require "arduous efforts," Premier Wen Jiabao said.