Many countries, including the US, have signalled that they will be unable to enter a legally binding deal on emissions cuts.
There will also be pressure for countries to come up with significant contributions in the period up to 2020 when a new deal is likely to come into force.
There are concerns that the scale of division between the interests of richer and poorer countries could lead to stalemate.
"I believe the developing countries need to be careful who they allow to speak as their leadership," said Paul Bledsoe.
"I don't believe that petrol states like Saudi Arabia or Venezuela are the appropriate leaders for the interests of less rich countries, most of whom do not have fossil resources.
"It is important that the great majority of developing countries who don't have fossil resources don't get gamed by those who do."
Many attendees believe that the concerns about temperatures, and the engagement of political leaders, as demonstrated in recent months, will be positive for the process.
"I think, this top-down pressure will force countries to think they can't always retreat to their old school lines," said Liz Gallagher.
"Whether that will be positive or negative, I think that disruption to the negotiation dynamic is helpful at this stage.
"I think the countries' 'true colours' will start to come out a bit. That's useful for the public to know."
Many countries, including the US, have signalled that they will be unable to enter a legally binding deal on emissions cuts.
There will also be pressure for countries to come up with significant contributions in the period up to 2020 when a new deal is likely to come into force.
There are concerns that the scale of division between the interests of richer and poorer countries could lead to stalemate.
"I believe the developing countries need to be careful who they allow to speak as their leadership," said Paul Bledsoe.
"I don't believe that petrol states like Saudi Arabia or Venezuela are the appropriate leaders for the interests of less rich countries, most of whom do not have fossil resources.
"It is important that the great majority of developing countries who don't have fossil resources don't get gamed by those who do."
Many attendees believe that the concerns about temperatures, and the engagement of political leaders, as demonstrated in recent months, will be positive for the process.
"I think, this top-down pressure will force countries to think they can't always retreat to their old school lines," said Liz Gallagher.
"Whether that will be positive or negative, I think that disruption to the negotiation dynamic is helpful at this stage.
"I think the countries' 'true colours' will start to come out a bit. That's useful for the public to know."
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