The UN climate chief has urged governments to make real steps towards a new treaty to battle climate change.
It comes as delegates meet in the Chinese port city of Tianjin in an attempt to thrash out a new deal to follow the Kyoto protocol, which expires in 2012.
The talks are the last major round before the main climate meeting which takes place in Cancun in Mexico at the end of November.
The talks have been marred by a lack of trust between rich and poor countries over climate funding, transparency over emission cut pledges and the emission reduction targets of rich nations.
The climate conference in Copenhagen in 2009 ended in bitter name calling between rich and developing countries and delivered a non-binding accord that left key issues unsettled.
A deal is key in Cancun if the talks are to maintain any sort of credibility.