David Cameron says cash spread over five years will come out of foreign aid budget as he meets Ban Ki-moon and François Hollande at UN
Al Gore poses a crucial question, is David Cameron really willing and able to lead on climate change?
For the environment the first 100 days of the Cameron government have been as bleak as the air around a coal-fired power plant - the Prime Minister does not have long to deliver on his green promises
UK green energy cutbacks look "parochial and small-minded" against EPA's Clean Power Plan, says Greenpeace
Heads of 10 groups, including National Trust, Greenpeace and RSPB, call the cutting or watering-down of 10 key environmental policies woeful and shocking
Latest league table of global clean energy attractiveness sees UK remain in eighth position
Alastair Harper of Green Alliance says David Cameron will need small policy develoment but major political investment to cut emissions at home and abroad
Prime Minister should advocate goal to bring net global emissions down to zero by mid-century, NGOs and businesses say ahead of key meeting
UK Prime Minister says he is 'fully behind' François Hollande's ambitions for a global climate deal
Prime Minister is expected to play a leading role at the UN Climate Summit in Paris, but green legacy rests on his ability to navigate a series of diplomatic tests