The report, entitled "Greenhouse Gas Mitigation in Brazil, China and India: Scenarios and Opportunities through 2025," also finds that 70 per cent of China's unilateral emissions reductions had been financed domestically.

"Our analysis shows the actions China and Brazil are taking will result in emissions cuts to levels comparable to what the United States is projected to do under its voluntary target by 2010, also equal to nearly 40 per cent of what the EU will do by 2010," said Ned Helme, president of the Center for Clean Air Policy (CCAP), the US-based think-tank that produced the report.

Chinese officials heralded the report's findings.

"The results of this project and our continued work with CCAP to find win-win opportunities for climate policy in China will be very important in helping us move forward," said Lu Xuedu, deputy director of China's Office of Global Environmental Affairs under the Ministry of Science and Technology. "The more developed countries do, the more developing countries will follow."

UN Secretary-General Kofi Annan also noted China's contribution to the global effort to mitigate climate change.

"Rapidly growing economies like China have been increasingly successful in decoupling economic growth from energy use, thereby reducing the emission-intensities of their economies," he told the conference on Wednesday.

More than 6,000 people, including 100 cabinet ministers, from around the world took part in the two-week United Nations Climate Change Conference in the Kenyan capital, Nairobi. The conference is scheduled to end today.

A top Chinese official on Wednesday reiterated China's commitment to addressing the threat posed by climate change.

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