The hope is that, by the end of this week, a new draft agreement will be ready for environment ministers to haggle over during the second half of the conference.
One of the biggest differences is said to be over what's termed "differentiation" in the talks.
The US and other wealthy countries object to the fact that in these negotiations, a country is determined to be developed or developing based on its wealth when this body was formed back in 1992.
They argue that any new deal must accurately reflect the current position, meaning that a larger number of countries would have to share the burden of cutting carbon.