Ahead of the Copenhagen summit next month, the United Nations Climate Chief Yvo de Boer on Friday said that all the countries have to increase focus on their emission targets, including the United States.

Boer, who is director of the United Nations Framework on Climate Change (UNFCC) pointed out to developing countries like India, China, South Africa and Mexico that have national climate change strategies in place and urged Washington to come up with concrete emission reduction targets.

"The list of what is on the table is rather long," he said. "We now have offers of targets from all industrialized countries with the exception of the United States."

Russia and Europe had offered to increase its targets, he said adding that Brazil and South Korea had committed to making ambitious cuts.

He dismissed reports that doubted the success of the Copenhagen Climate Change Conference.

"I have some recent reports that Copenhagen has failed even before it starts and I must say those reports are simply wrong," Boer said.

Boer expressed confidence that the negotiations in the Copenhagen meet would lead to important political commitments, which would be translated into a treaty within six months.

Around 192 countries are scheduled to meet in the Danish capital to chart out a climate treaty succeeding the Kyoto Protocol since the first commitment period under this treaty ends in 2012.

The countries are expected to agree on four essential elements - ambitious emission reduction targets for industrialised countries, nationally appropriate mitigation actions by developing countries, and financial and technological resources for developing countries to adapt and achieve clean economic growth.

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