Telegraph: The Prime Minister wants EU countries to promise to reduce carbon emissions by 30 per cent, rather than the 20 per cent they are currently offering. European negotiators at the conference have said they will sign up to the 30 per cent target if other major polluting nations — including the US and China — consent to radical cuts. But Mr Brown is calling for EU members to step-up their efforts to combat global warming whatever the rest of the world decides. "We’ve got to …