The two-week negotiations begin on Monday and carry far lower expectations than did last December's climate change talks in Copenhagen.
Negotiators seeking to lay the groundwork for a global warming summit in Mexico in November appear to be moving further from consensus.
Some specialists are calling for an overhaul of the UN global warming process, which yielded only modest progress in Copenhagen.
At the Copenhagen climate talks Secretary of State Hillary Clinton said the US could provide billions in aid to help poorer nations convert to clean technologies. But that's only if countries like China agree to monitoring of their climate change efforts.
Negotiations on a deal to curb greenhouse gas emissions and head off global warming were suspended Monday morning in Copenhagen, with poorer countries charging wealthier nations aren't prepared to make necessary cuts in CO2 emissions.
After the first week of global warming talks in Copenhagen, disagreements between nations are still evident, particularly between industrial heavyweights the US and China.
A Senate bill's target for emission cuts is akin to level US is likely to offer in Copenhagen. Ahead of the global warming talks, other nations have been waiting to see US target.