Delegates at the UN climate change summit say they've reached an historic deal.

The Paris climate change summit has come to an end, with countries agreeing to a long-term goal of limiting global temperature rises to well below two degrees.

There's also a five-year review system which is aimed at getting countries to cut their CO2 emissions sharply.

UN Secretary General Ban Ki moon said it's an historic moment.

"Solutions to climate change are on the table. They are ours for the taking now. Let us have the courage to grasp them."

Sky's Mark Stone is at the summit, and says the mood amongst delegates is very positive.

He said the Un Secretary General called it "a defining moment on a long journey" and "a historical document that promises to set the word on a new path".

And Stone said the feeling runs across the board.

"When you talk to scientists, to campaigners, to Greenpeace, they too are very, very pleased."

The Green Party's representative at the talks agrees it's a very good deal.

MP Julie-Anne Genter said it's an impressive package.

"It's ambitiously calling for limiting warming to well below two degrees. In fact, having a goal of even 1.5 in the text, which is fantastic."

The G77 bloc of 134 developing nations, including China, gave the nod for the hard-fought UN climate rescue pact due to be presented for adoption in Paris.

The G77 added its voice to those of the Like-Minded Developing Countries group, the European Union, and the Least Developed Countries - all of whom came out in support of the final draft which was presented to ministers by host France in the early morning hours.

Rich and developing nations have been at odds for years over questions of fairness and finance in sharing out responsibility for greenhouse gas emission curbs.

Developing nations insist rich countries must shoulder the lion's share of responsibility for tackling climate change as they have polluted most since the Industrial Revolution - a principle known as "differentiation".

But the United States and other rich nations say emerging giants must also do more as they account for most of today's emissions and will be largely responsible for future warming.

Finance for developing nations to make the shift to costly renewable energy and shore up defences against climate impacts, has been another long argument.

A deal seeking consensus positions on all these points has been carefully hammered out by negotiators over years, and the finishing touches added in tough negotiations which opened in Paris on November 30.