Politicians at the World Economic Forum in Davos have vowed to reach a "substantial" deal on climate change.
The world's leaders will meet in Cancun, Mexico, later this year - after a disappointing conclusion to talks in Copenhagen last month.
Mexican President Felipe Calderon acknowledged that there were "low expectations" for Cancun.
But he said: "Our objective is to reach a robust, substantial and comprehensive agreement".
He stressed that the economic costs associated with tackling climate change would be central to the challenges facing governments.
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