The talks aimed to finalise an agreement on cutting greenhouse gas emissions to replace the Kyoto Protocol.
Some nations have backed a new agreement, but others say it is useless unless big developing countries such as China and India sign up.
The small pacific island of Kiribati says its fate lies in the balance as the talks in Doha wrap up.
Kiribati Climate Advocate Maria Tiimon Chi-Fang told Pacific Beat she hopes the final day will be more productive.
"They keep talking and they keep negotiating and they keep bringing new proposals up, but sadly, it is very, very slow action, and that is very, very disappointing." she said.
Call for help
Rich nations are yet to firm up pledges to deliver billions of dollars to poorer countries, already on the front line of climate change.
With greenhouse gases increasing at an unprecedented rate, island nations such as Kiribati say without compensation, there is little hope.
"Poor countries such as Kiribati contribute very least to the global issue but they're right at the front line and bare the greatest burden of loss and damage," said Ms Chi-Fang.
"I even feel that mitigation might be too late, we cannot reverse our land, our culture our rights if we lost them due to climate change."
Developing nations are urging rich countries to end their bickering and break the deadlock over funding to help poor nations cope with global warming.
The head of the Philippines delegation, Naderev Sano, made an emotional appeal to world leaders and governments attending the talks.
"The outcome of our work is not about what our political masters want. It is about what is demanded of us by seven billion people.
"I appeal to all, please no more delays, no more excuses, let Doha be remembered as the place where we found the political will to turn things around," he said.
Erwin Jackson, deputy head of the Australia-based Climate Institute, said the Doha talks are finely balanced but a deal is still within reach.
"If ministers can come together and find ambitious and pragmatic solutions to the blockages that are currently confronting the talks and if we can do that we can actually get the world on a path to a new legally binding agreement," he said.