Barack Obama

Department of Interior approves three of the largest renewable energy projects in US history

Open letter signed by 32 leading figures says global agreement in 2013 would address climate change, boost international relations, and help airlines

Mixed reaction from green groups as President appoints pro-nuclear Energy Secretary Ernest Moniz

Controversial State Department study concludes pipeline will not lead to a net increase in greenhouse gas emissions

Rajendra Pachauri says US president should push for improving public's understanding of man-made global warming

President faces jobs dilemma over controversial Keystone pipeline with decision expected in April

From Congressional Climate Change Bills to green Valentine’s Day gifts, we run down the top stories from the past seven days

Proposal to target most polluting facilities in America would raise $1.2trn, 60 per cent of which would be returned to bill payers

Senators Barbara Boxer and Bernie Sanders slated to unveil comprehensive climate change legislation following Presidential ultimatum

President pledges to take executive action to slash greenhouse gas emissions and outlines plan for new Energy Security Trust