A handful of fossil fuel producing countries and industries show no interest in a strong, restrictive and legally binding instrument.
Oil and plastic producing nations and lobbyists sought more emphasis on recycling instead of production cuts.
This is the third round of talks to develop an international legally binding deal that includes plastic waste in the ocean.
African leaders say they have a market-based plan to fight human-caused global warming that will spread economic development among millions of people on the continent.
The treaty body that gets the worst cooperation is the Committee on the Elimination of Racial Discrimination.
The summit ended with support for creating a "zero draft" treaty ahead of the next negotiations at Nairobi in November.
About 69% of all the plastics produced, mainly through fossil fuel burning, are used just once or twice before they are thrown away. About 22% is mismanaged. Just 9% is recycled.
Low rainfall and high evaporation rates 'would not have led to drought at all in a 1.2° C. cooler world,' scientists concluded.
The summit is held once every three years to examine protections for wild animals and plants traded internationally.
The aim is to establish better networks of support worldwide for advocates and raise the pressure for perpetrators of violence and intimidation to be held accountable.