i found this Reuters article , claiming USA has formally agreed to reduce emissions by 17%
http://www.reuters.com/article/idUSTRE60R6YF20100128?feedType=RSS&feedName;=topNews&utm;_source=feedburner&utm;_medium=feed&utm;_campaign=Feed%3A+reuters%2FtopNews+%28News+%2F+US+%2F+Top+News%29