A G8 summit made next to no progress toward a new UN climate treaty, due to be agreed in December with some nations back-pedaling on promises of new action even before the end of a meeting in Italy this week, according to Reuters.

The UN’s top climate change official Yvo de Boer even said the meeting of 17 member states ‘had not given him a huge rush of adrenalin’.

“Generally, this is a careful but useful step forward toward Copenhagen. I’m still confident that the deal can be done,” he said of the UN pact due to be agreed in mid-December.

The G8 also failed to persuade China, India and other developing nations to sign up for a goal of halving world emissions by 2050.

Among progress, rich and poor nations acknowledged that temperature rises should be limited to 2°C (3.6°F) – a goal that would force deep cuts in greenhouse gas emissions if followed through.

The G8 nations also set a new goal of cutting their overall emissions by 80% by 2050.