Barack Obama

Official: "We should try to complete the job earlier than later"

Crucial series of bi-lateral talks between world's three largest emitters gets underway as Obama says he could attend Copenhagen

Senator reckons draft US climate bill commanding bi-partisan support could be ready before UN summit

Senate delay means no bill likely before Copenhagen

As EU negotiators call on the US to end Copenhagen deadlock, German Chancellor prepares to tell Congress it must do more to tackle climate change

Move met with opposition from Baucus and Inhofe

President expected to announce up to $3.4bn in smart-grid grants as Department of Energy releases fresh climate science funding

As leading Republicans dig their heels in, President Obama insists a consensus is building in favour of carbon legislation

Top aide says bipartisan talks are delivering "very encouraging" results

Prime minister will tell the Major Economies Forum that world leaders have an historic opportunity to reach an international deal this year