BELÉM, Brazil — The European Union is preparing to veto the final deal at this year’s climate summit if countries do not agree to stronger efforts to cut planet-warming emissions, according to four European diplomats.

The negotiators said the 27 countries were united in their anger at the draft deal that the COP 30 talks’ Brazilian presidency offered Friday morning, saying it had crossed the bloc’s red lines on financing and did not reflect their push for countries to do more to slash pollution.

The European Commission took the unusual step of publishing a short speech that climate chief Wopke Hoekstra gave in a closed-door meeting at noon local time Friday.

The current draft deal contains “no science… no transitioning away [from fossil fuels]… But instead, weakness,” Hoekstra said. “Under no circumstances are we going to accept this… You can count on us to do our absolute utmost to deliver. Not for the EU. But for all of us.”

At a coordination meeting this morning, EU ministers were asked to secure support from their governments to block the final agreement if no changes are made, the four diplomats said.

“We’ve told ourselves in the past that we should have the balls to walk out if the text is not strong enough. But until today I’ve not heard us say it this loudly and as part of an actual strategy,” one of the diplomats said. The diplomat, like others in this article, was granted anonymity in order to discuss the private meetings.

The divisions set up a possibility that countries could walk away from these talks without a final outcome.

The Brazilian president of this year’s COP30 talks, André Aranha Corrêa do Lago, pleaded in an opening speech for countries to come together and show their support for the 2015 Paris Agreement, especially after the United States walked out of the deal and refused to send delegates to the conference in Brazil.

“This cannot be an agenda that divides us,” Corrêa do Lago said. “But at the same time that we have to face the fact that the largest economy in the world has left the Paris accord, we have to remember that we all stay in because we all believe in it. We cannot be divided inside the Paris accord.”

But a second European diplomat said that, in the absence of the U.S., a group of emerging economies including China, Russia, India, Brazil and South Africa, known as the BRICS, had seized the initiative to stamp down on efforts to cut emissions.

“This is a BRICS COP,” the diplomat said. “They’re circling around now a text which is designed for them and they’re all now saying it’s a take-it-or-leave-it text.”

Alden Meyer, a long-time COP watcher and senior associate at climate think tank E3G, said: “There’s definitely a possibility this could fall apart.”

A proposed roadmap for tracking and marking national progress in transitioning off fossil fuels, backed by more than 80 countries including most of Europe, did not appear in the text. It has become one of the key asks for governments trying to enhance global progress for ditching fossil fuels that are heating the planet.

But a clutch of oil-, gas- and coal-producing countries has resisted the effort, which has become the most divisive issue at the negotiations.

“We can only talk about things that are in the text,” Maesela Kekana, South Africa’s lead negotiator, said in an interview. “Why are you talking about something that does not exist?”

The text largely accounts for where the world is with respect to hitting national climate goals and a challenging geopolitical situation, said Li Shuo, director of the China Climate Hub at think tank Asia Society. He said that includes U.S. President Donald Trump’s threats on trade and an EU bloc whose nations are responding to domestic calls to restore industrial competitiveness.

“I see the current text as actually a pretty accurate reflection of that situation,” he said, describing “the lack of ambition and the fact that many countries are having a hard time on their domestic climate push.”

But for the EU and many vulnerable countries, it’s essential to leave Belém with a strategy to address the enormous gap between the world’s collective emissions-cutting efforts and the Paris Agreement targets to curb global warming.

“We cannot negotiate with a text that does not include a mention of fossil fuels, a mention of a roadmap to end deforestation. We cannot take as good faith a text that fails to set a global goal on adaptation finance,” said Juan Carlos Monterrey Gómez, Panama’s lead negotiator. “It is simply so weak that it’s offensive.”

The European countries were also preparing to cross their own red lines on proposals to funnel more money toward developing countries’ efforts to prepare for climate disasters.

The draft text includes a commitment to triple the finance now flowing to poorer countries to help them cope with the ravages of climate change, known as adaptation finance, by 2030.

That’s an unacceptable timeline, said the second European diplomat. But indicated that 2035 might be acceptable.

It “goes well beyond the red lines of what most of us came in with,” said the diplomat. “The trebling is more than most donors can do, but we’re kind of over a barrel.”

If the EU gets more on climate action, Hoekstra said in his speech published online, “yes you can ask the EU to move beyond its comfort zone on the financing of adaptation.”