Wealthy nations need to "put their money where their mouth is" and promise finance for a global climate change deal, Climate Change Secretary Ed Miliband has said.
Speaking at his departmental question session on 5 November, Mr Miliband told MPs he expected negotiations at next month's crucial international summit in Copenhagen to go "right down to the wire", with funding for developing countries set to be a potential stumbling block.
He also said the aviation and maritime industries would be expected to help fund a deal.
At last week's European Council, the EU's leaders agreed to a 100bn (£89.5bn) annual package of public and private finance by 2020 to help poorer nations develop green industries and adapt to climate change.
Shadow climate change secretary Greg Clark backed Mr Miliband's approach to the summit in the Danish capital.
But Labour backbencher Paul Flynn asked the secretary of state: "Why are expensive new nuclear developments advancing at the speed of a striking cobra, while good value, clean marine developments are moving at the pace of an arthritic sloth?"
Mr Miliband said it had been a challenge to prove that the marine technology worked in generating power.