China, the world's biggest emitter, is also against the 2015 deadline.

However other "big emitters" do not want the treaty to come into force until after 2020.

It is not the poor who are the biggest emitters of carbon.

Why is the United States such a big emitter?

But many of the big emitters were not ready for that yet.

However business groups and some big emitters, especially in the mining sector, are opposed to the pricing scheme.

The United States is by far the world's biggest emitter of carbon dioxide.

Hard to see how big emitters like the US will compromise to greater cuts.

He said having, for the first time, all the big emitters committed to a legal deal, by 2015, is significant.

If we want to achieve this objective, we must win the support of the largest countries and the biggest emitters.