Barack Obama

State unveils raft of new policies designed to drive clean tech investment, including legislative push for state funds to divest from coal

Department of Energy says $1.7bn project would not meet September deadline for federal funds

Environmental Protection Agency deals blow to tar sands pipeline plans as analysis suggests project would lead to "significant increase" in emissions

President outlines plans for $4bn carbon cutting fund for states and seven per cent increase in clean energy spending

But supporters fall short of votes needed to overturn promised Presidential veto

Senate votes overwhelmingly that climate change is real, but GOP Senators line up to reject scientists' warnings that humans are a cause

President uses State of the Union to warn that he will not let Congress turn back the clock on climate action

Reports suggest president Obama is preparing to make climate action a centrepiece of his State of the Union address, but Republicans remain deeply opposed to White House agenda

The plan, a clear signal the president aims to shore up his climate legacy, applies only to future oil and gas infrastructure – a move environmental groups say will fail to combat the rise in emissions from the booming US oil and gas industry

Environmental Protection Agency expected to announce new measures to cut methane emissions 45 per cent by 2025