U.N. climate talks shun carbon budget shareout as too radical

WARSAW (Reuters) - Governments are shying away from their own warnings that the world has only a fast-shrinking budget of carbon emissions left to use to avoid damaging global warming, frightened off at U.N. climate talks by the radical cuts it would require.

To keep warming to a level that most have defined as manageable, developed nations would have roughly to halve their greenhouse gas emissions by 2030 from 2010 levels, far beyond most governments' plans, said Niklas Hoehne of research group Ecofys.