US Secretary of State John Kerry says advance nations must make tough decisions in order to reach a global climate deal that will reduce the threat of global warming.

"We had a very constructive meeting. We made a lot of progress. Progress made last night, a long night, but there's still a couple of very difficult issues we're working on," Kerry said on Friday after holding talks with summit host, French Foreign Minister Laurent Fabius, in Le Bourget near Paris.

India has demanded that developed nations like the United States, which have mostly contributed to climate change, should bear the cost that countries face in adapting to the effects of global warming.

"The responsibility is on a lot of us to provide language for potential compromise in areas where it's possible," said Kerry, who after speaking to reporters went to meet Indian Environment Minister Prakash Javadekar.

Nearly 200 countries are attending the United Nations Framework Convention on Climate Change, which opened on November 30 in at Le Bourget on the outskirts of Paris and is scheduled to conclude on December 11.

The climate summit aims to reach an agreement to reduce greenhouse emissions that cause global warming. The US and China are the largest producers of carbon emissions in the world.

Speaking at the opening session of the summit, US President Barack Obama acknowledged that the United States is at least partly to blame for the life-threatening climate change.

"I come here personally as the leader of world’s biggest economy and second biggest emitter to say that America not only acknowledges its role in climate change but embraces doing something about it," Obama said.

In his meeting with Chinese President Xi Jinping last week, Obama highlighted the work he and Xi have done on climate change.

“As the two largest economies in the world and the two largest carbon emitters, we have both determined that it is our responsibility to take action,” Obama said.

“And so our leadership on this issue has been absolutely vital, and I appreciate President Xi’s consistent cooperation on this issue,” he added.