A report from the Intergovernmental Panel on Climate Change said last year it was ''likely'' that global warming meant more intense cyclones in future.
It has long been the holy grail for those who believe that technology can save us from catastrophic climate change: a device that can ''suck'' carbon dioxide from the air.
Developing countries, including China and India, are unwilling to sign up to a new global climate-change pact to replace the Kyoto Protocol in 2012 because the rich world has failed to set a clear example on cutting carbon emissions, according to the United Nations's top climate official.
Rising food prices could spark worldwide unrest and threaten political stability, the United Nations's top humanitarian official warned on Tuesday after two days of rioting in Egypt over the doubling of prices of basic foods in a year and protests in other parts of the world.