Australia would support a United Nations review of restricting global warming to 1.5 degrees, despite holding firm on a less ambitious goal.

The call for a special report by the UN climate science body is understood to have come from a group of vulnerable nations, who believe the two-degree goal would severely damage their countries.

Those nations, like the Pacific Islands, want the 1.5-degree goal included in a global agreement to curb emissions, which is being negotiated an major climate talks in Paris.

France and Germany on Thursday became the first developed countries to back that call, which is now supported by 108 countries.

Australia isn't one of them, but it's understood negotiators are happy to see a reference to an aspirational 1.5-degree goal somewhere in the agreement.

Environment Minister Greg Hunt said Australia also supported UN analysis of that level of warming and had raised the issue with the Intergovernmental Panel on Climate Change.

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"Our mandate is obviously very clear, but in terms of the analysis it is something we have encouraged the IPCC to consider as a constructive element in working towards an overall Paris agreement," he told reporters on Friday.

It comes after a scientific review of the adequacy of the two-degree target was blocked on Thursday at the talks - mainly by Saudi Arabia, which relies heavily on fossil fuels.

Pascal Girot, a member of the Costa Rica delegation, said the two-year review was a critical link between science and policy, and believes the negotiating process has politicised the science.

"Now we don't have the scientific arguments to push forward an ambitious agreement," he told AAP in Paris.

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The move also highlighted tensions within the developing nation negotiating block, known as the G77.

Monica Araya, a member of the Climate Vulnerable Forum expert group, said the tensions in Paris went much deeper than just the major players such as the United States, China and India.

"These (vulnerable) countries are coming with ideas that are being blocked by other developing countries," she told AAP in Paris.

"What is becoming very uncomfortable for Paris, is how are you going to deal with the puzzle in the south."

While negotiators argued over the text, those from the most vulnerable nations in the Pacific called for delegates to put themselves in their shoes.

Tinaai Teaua, a 23-year-old from Kiribati, has flown to Paris for the talks and says she's "fighting for my future".

"I'm going to have more ahead of me, I want to have children, I want to stay on my own land," she told AAP in Paris.

"I don't want to move."

Pulafagu Toafa, who lives in Tuvalu, says it's a matter of life and death for her people.

"We want people to consider that we are also human beings and we need life," Ms Toafa told AAP.

"We are part of the world and we beg these countries to put themselves into our shoes, please."

Negotiators spent Friday deliberating over new draft texts that were produced overnight.

They have until midday on Saturday when they'll have to turn over whatever they've managed negotiate to the French, so the hosts can take over the process for high-level negotiations next week.