http://www.bloomberg.com/news/2011-03-21/china-india-brazil-pledge-emission-limits-to-united-nations-climate-body.html

China, India and Brazil pledged to limit their greenhouse gas emissions in documents submitted to the United Nations Framework Convention on Climate Change, formalizing commitments made in Copenhagen in December 2009.

China said it will try to lower carbon-dioxide emissions per dollar of economic output at least 40 percent by 2020 from 2005 levels, according to a document dated March 18 and e-mailed today by the UN body, which stewards global climate treaty talks. India said it aims to cut emissions per dollar at least 20 percent in the same period while Brazil said it’ll slash heat-trapping gases more than a third from projected 2020 levels.
The pledges were among those made by 48 nations included in a non-binding document that forms part of agreements reached in Cancun, Mexico, last December. Climate negotiators at the time said emissions goals would be documented while not publishing the actual numbers.
While the commitments are not legally enforceable, they formalize promises made in the Copenhagen Accord, an agreement reached in the Danish capital in 2009 that was rejected as a formal UN document because countries including Bolivia, Sudan and Tuvalu didn’t accept it.
In a second document, dated March 10, the UN compiled emissions reductions goals for the 27-country European Union and 15 developed nations, including the U.S., Japan, Canada and Australia.