More countries reject OECD study on climate aid

China, Brazi and South Africa join India in refusing key report that state rich countries have already mobilised two-thirds of $100bn pledged for climate aid

China, Brazil and South Africa have joined India in rejecting a key OECD study stating that rich countries have already mobilised nearly two-thirds of the $100bn (67bn) pledged to secure a new climate deal.

The refusal by the world's four most powerful developing countries to accept the methodology used by western economists, to calculate the money raised for poor countries to adapt to climate change, suggests that finance will be the major hurdle at the end of the talks on Friday.