Climate deal holds temp rises below 2C

French Foreign Minister Laurent Fabius says a draft climate pact hammered out after two weeks of talks in Paris was ambitious, balanced and if adopted would be an "historic turning point" to keeping temperature rises well below 2 degrees Celsius.

Cracking with emotion after talks ran into a day of overtime, Fabius said the text nearly 200 governments must now endorse constituted "the best balance possible".

It seeks to keep temperature rises "well below" two degrees Celsius and if possible to limit global warming to 1.5 degrees, Fabius told delegates to loud applause.

Another major debate has been over a promise that developed nations should provide $US100 billion ($A137.19 billion) to help poorer nations deal with the consequences of climate change.

Fabius said the draft text would set that figure as a floor by 2020.