UN Climate Chief Yvo de Boer: "Although there was no legal agreement in Copenhagen, there was a very strong political consensus"
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.
In a response that contained a number of "ifs" he said, "If we can find an economic mechanism ... we will be on track."
CEO of Vestas Wind Systems, Ditlev Engel talks about hopes for global wind energy usage
Last December's talks in Copenhagen failed to end in a legally binding agreement by the 193 member states of the United Nations.
However, key states, including the US and China, reached what they call a "meaningful agreement" on a number of issues, such as a recognition to limit global temperature rises to less than 2 degrees Celsius.
The accord in Copenhagen "was not enough, nobody was satisfied with it," Mr Calderon said in Davos.
He wants to "learn from our mistakes" and re-establish "trust and confidence" when countries meet to thrash out a climate treaty this December.
Congressman Edward Markey said that "significant" climate legislation was likely to pass through both houses of Congress this year and would be signed by US President Barack Obama.
Mr Markey said it was important to be done very soon. "There's no emergency room for our planet," he said.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.