In the aftermath of the Copenhagen Summit on Climate Change, wherein the US and other countries reached an accord on voluntarily reduction of green house gas emission, there is still work to be done at the domestic front, the Obama Administration has said.

"Clearly, there's still work to be done," Assistant Secretary of State for Public Affairs, P.J. Crowley, told reporters at his daily news conference yesterday.

A large number of countries, including the US have committed to Copenhagen accord. "We obviously supported and worked very hard with the Secretary, with the President in Copenhagen in late December to reach this agreement," he noted.

"There's work to be done domestically in terms of our own legislation that enshrines the 17 per cent pledge that the United States has made," Mr. Crowley said.

"And there's work to be done coming out of Copenhagen to make sure that there is an accounting process and oversight as countries continue to pursue their respective pledges," he said adding that the Obama Administration is supportive of this process.

"We're moving forward. It is one of the more urgent matters that we face globally. I’m sure that this will be a cornerstone of that effort, but certainly, to the extent that we can continue to pursue reductions in greenhouse gases through a variety of means, we will do so," Mr. Crowley said.