China ? Hopes dimmed for progress at climate talks in China as negotiators moved into their final day Saturday with little consensus.

Marred by an atmosphere of mistrust, negotiations have made little headway as China and the United States, the world’s two largest emitters of greenhouse gases, hardened their positions and traded recriminations, said Wendel Trio, international climate policy director for Greenpeace.

“What we’ve seen is that both opponents have kind of elaborated their opposition further, rather than trying to come together,” he said.

Delegates from more than 150 nations have been negotiating in China’s northeastern city of Tianjin for the past week, working to lay the groundwork for a major climate meeting in Mexico in December.