Secretary-General Ban Ki-moon is urging all countries to cut carbon emissions following the recent agreement on a timeline to set a new course to combat climate change.
Ban praised the international community for reaching a deal at climate talks in Durban, South Africa to ratify a new legally binding agreement to tackle global warming by 2020.
He said there must be agreement before then - possibly by 2015 - to allow time for ratification.
In the meantime, he called for reductions in carbon emissions and urged developed countries to help developing countries tackle global warming by providing new technology.
Ban said donors have indicated a readiness to contribute about US$30 billion to the Green Climate Fund to help developing countries cope with climate change.
AP