"I think India played a particularly constructive role in Cancun," Special US Envoy on Climate Change, Todd Stern told reporters at a news briefing.

The Indian delegation was led by Environment Minister Jairam Ramesh at the meet.

"I think that India was very much faithful to its own national interests and faithful to its role in the G-77, but at the same time creatively looking for solutions to difficult issues in the negotiation in a way that could bring in both, developing and developed nations," Stern said in response to a question.

"India really played a particularly constructive role in trying to find solutions that would bring everybody to the table. And one good example of that is on the issue of transparency, which was very important," he said.

It was important because all countries should have confidence in each other so that the pledges were actually taken to a logical conclusion, Stern said.

"And so it's an important issue -- very different views, and India found -- India made a proposal that I think people fundamentally came around. Its ultimate language wasn't exactly what India suggested, but it was really quite important, and India did that," Stern said while appreciating India's role at the Cancun meet.

Responding to questions, Stern said the US will not commit to legally binding commitment on climate change until it is done by countries like India and China.

"It's not so much that we're calling on China or India to make legally binding commitments right now. What we're saying is we will do legally binding commitments only if they are symmetrical, if the emerging market countries do that also. If they're not ready to do it, it's not so much that we're criticizing that," he said.

The US position on China is that it needs to make significant reductions in its emissions.

"But for China or other developing countries, at this stage those are going to be relative reductions. Those are going to be reductions against the so-called business-as-usual path that they would be on," he noted.