Some 150 countries representing around 90% of the world’s carbon emissions have now filed pledges to curb them, dramatically increasing the chances of a deal at the Paris climate summit in December.

The promises made so far would still put the world on track for dangerous global warming rise of 3C (around 9F). But they could be adjusted in the future to meet the 2C target recommended by international scientists, the EU’s climate commissioner, Miguel Cañete, told a UN conference in Rabat, Morocco.

“The gap is not as big as expected if the INDCs (intended nationally determined contributions) are transformed and fully implemented,” said Cañete. “Their scope and scale is an achievement in itself.”

The French development minister, Annick Girardin, said that many of the pledges came from developing countries, and had brightened prospects for a climate treaty in December.

“We’ve now got a global positive dynamic telling us that the world is moving on climate change,” said Girardin. “It was unexpected to receive all these contributions and it sends a very strong signal from Rabat that we can reach a global agreement in Paris.”