The developed countries have agreed to bring emissions down by only 50 percent by 2050.

But some hope was there in the declaration of leaders of the major economies forum (MEF) here Friday as they resolved to reach an agreement on climate change at the UN conference on climate change to be held December in Copenhagen.

'We reaffirm the objective, provisions and principles of the UN Framework Convention on Climate Change. Recalling the Major Economies Declaration adopted in Toyako, Japan, in July 2008, and taking full account of decisions taken in Bali, Indonesia, in December 2007, we resolve to spare no effort to reach agreement in Copenhagen, with each other and with the other parties, to further implementation of the Convention,' the declaration said.

The declaration talked about future cooperation on climate change, consistent with equity and common but differentiated responsibilities and respective capabilities.