Fifty-five countries have submitted pledges for curbing greenhouse gas emissions to the UN climate convention.
Governments were asked to do so before 31 January by the "Copenhagen Accord", the document produced at December's UN climate summit in the Danish capital.
In some cases the pledges are weaker than those made before the summit.
The UN's top climate official, Yvo de Boer, said the pledges would invigorate the UN process, but several environment groups say they do not go far enough.
Source: BBC
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