Emissions of carbon dioxide and other greenhouse gases must drop by 40-70 per cent by 2050 to keep the global temperature rise below the 2-degree C (3.6-degree F) cap set in UN climate talks, the Intergovernmental Panel on Climate Change said.
The opposite is happening now. On average global emissions rose by 1 gigaton a year between 2000 and 2010, outpacing growth in previous decades to reach "unprecedented levels" despite some efforts to contain them, the IPCC said.
The panel didn't get into who should do what in the 33-page summary meant to serve as a scientific guide to governments negotiating a new climate agreement, which is supposed to be adopted next year.
Leaked drafts of that document showed the biggest reason for the rising emissions is the higher energy needs resulting from population growth and expanding economies in the developing world, mainly in China and other large countries.
"The problem for the governments was that they felt that these different perspectives can cause harm for them because they can be made at different scales responsible for the emissions," Edenhofer told The Associated Press.
The graphics divided the world into four categories, low, lower-middle, upper-middle and high income countries. Participants in the closed-door session said many developing countries objected to using such income categories.
