aders are due to gather at the UN in New York to try to revitalise talks on climate change.Attention is likely to focus on Chinese President Hu Jintao, who is expected to unveil stringent new plans to tackle global warming.
The meeting comes two months ahead of a summit in Copenhagan aimed at approving a global climate change treaty.
Negotiators are trying to agree on a replacement for the Kyoto Protocol to limit carbon emissions.
Chinese targets
UN Secretary General Ban Ki-moon called Tuesday's meeting an attempt to inject momentum into the deadlocked climate talks.
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