"The stark message for world leaders at Copenhagen is that the proposals on the table - especially from industrialised countries – fall far short of what the world needs," said Keith Allott, head of climate change at WWF-UK.
"This assessment from just two days ago is based on a very optimistic view of emissions reductions pledges that assumes away the huge loopholes where emissions are hidden and assumes all voluntary emissions reductions commitments will be met."
"Urgent action is needed to put global emissions on a pathway that would keep warming well below the accepted two degree threshold for unacceptable risks of catastrophic climate change," Allott said.
"It is a case of simple maths – we need much ambitious targets for developed countries, new and additional financial support to help low-carbon growth in developing countries, and action to plug the many loopholes that make existing emission pledges even weaker than they seem at first glance."