He says any binding deal coming out of the COP21 summit, which concludes on Friday, should factor in that the "dramatic fall" in the cost of wind and solar technologies will allow many emerging markets to "rapidly expand their clean-energy generation without the need for large-scale financial support from other states".

The funds being sought by many developing nations from the US and Europe to facilitate schemes to incentivise renewables investment are "not needed", O'Connor maintains.

"The