Barack Obama

Department of Energy report forecasts $5bn return from Federal programme Republicans tried to end after collapse of Solyndra

USA set to make biggest commitment to date to Green Climate Fund during G20 summit in Brisbane

BusinessGreen runs down the responses from key figures in the political, business and NGO sectors

A Republican-controlled Congress spells bad news for the green economy and UN climate change talks, but will it prove as disastrous as some environmentalists fear

Greg Barker, David Cameron’s former top climate change aide, criticises heads of state for no-show at New York dinner

The US Presidents speech in full from the United Nations Climate Summit in New York

The direction of travel in favour of bold climate action has never been clearer - the savviest businesses and investors are taking note

US President sets out ambition for a global deal on climate change in Paris next year

As 125 world leaders descend on the United Nations headquarters in New York, BusinessGreen keeps you up to date with the key events

Rich countries pledged to find $100bn a year by 2020, but so far only Germany has made a significant contribution