Christiana Figueres backs scathing critique by Graça Machel who accused world leaders of failing to grasp the full challenge of climate change
Greg Barker, David Cameron’s former top climate change aide, criticises heads of state for no-show at New York dinner
The direction of travel in favour of bold climate action has never been clearer - the savviest businesses and investors are taking note
New Efficient Appliances and Equipment Partnership launched to promote worldwide shift to energy efficient devices
David Cameron's New York climate speech - in full
Prime Minister urges EU to commit to deep emissions cuts and calls on world leaders to support green businesses and tear down clean tech trade barriers
Two major new international schemes aim to help businesses develop sustainable forest supply chains
US Secretary of States convenes first meeting of foreign ministers ahead of Paris summit in 2015
Family that made its fortune from oil wealth become highest profile investors yet to join divestment campaign
The head of the United Nations climate change secretariat outlines her expectations for the New York Climate Summit this week