New Delhi, Feb 2 (IANS): Prime Minister Manmohan Singh Thursday expressed concern over the lack of collective global will to address the climate change issue seriously and said India would play a constructive role in climate talks as far as it is based on "fair and equitable agreement".

Speaking at the 12th Delhi Sustainable Development Summit (DSDS) here, Manmohan Singh said there is a need for equity as the per capita emission of developed countries continues to be 10-12 times that of the developing world.

"India will play a constructive role in ongoing talks as far as it is based on fair and equitable agreement," he said.

Commending the progress made at the UN climate change talks in Durban, the prime minister said: "The 17th Conference of Parties (CoP) at Durban did achieve significant progress by agreeing to the second commitment period of Kyoto Protocol."

He said the ensuing climate talks should be based on the principles of equitable access to resources and common but differentiated responsibility.

"Durban must build on the Bali Action plan and we must find a solution to the problem keeping in mind that developing countries have the right to develop," he added.