Climate deal looks close, but may not halt warming

A deal at the UN climate summit looks more likely following a frantic day of behind the scenes diplomacy.

China signalled concessions on monitoring of emission curbs, and the US said it would commit money for developing countries.

Leaders are likely to have big choices to make when they meet on Friday.

However, a leaked document from the UN climate convention indicates the best deal likely here will not keep the temperature rise below 2C (3.6F).

Even if countries implement their biggest pledges, a rise of 3C (5.4F) is indicated, it concluded.