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President Donald Trump on Saturday criticized Democratic climate policies after scientists backed away from one of the most extreme global warming scenarios previously used in United Nations-backed climate models.
“GOOD VOYAGE! After 15 years of the Dumocrats promising that 'Climate Change' was going to destroy the Planet, the United Nations High Climate Committee just admitted that its own projections (RCP8.5) were WRONG! WRONG! WRONG!” Trump wrote in Truth Social.
Trump accused Democrats of using climate fears to justify energy policies and government spending.
“For too long, Dumocrats have used climate activism to scare Americans, push horrible energy policies, and fund BILLIONS for their bogus research programs,” he continued. “Unlike the Dumocrats, who use climate alarmism nonsense to push their NEW GREEN SCAM, my administration will always be based on TRUTH, SCIENCE and FACTS!”
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President Donald Trump speaks to the media before boarding Marine One on the South Lawn of the White House on April 16, 2026 in Washington, DC. (Anna Moneymaker/Getty Images)
Trump's comments came after climate scientists stopped using the most extreme emissions scenario developed under the United Nations-backed Intergovernmental Panel on Climate Change (IPCC).
The IPCC's worst-case scenarios, which included significant global temperature increases and sea level rises, included global crop failures and even possible dinosaur-scale extinction events.
The scenario, known as RCP8.5 and later SSP5-8.5, projected severe global warming outcomes under extremely high emissions assumptions.
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EPA Administrator Lee Zeldin speaks alongside President Donald Trump in the Roosevelt Room of the White House on February 12, 2026, announcing the reversal of the 2009 endangerment ruling on climate-warming emissions. (Anna Moneymaker/Getty Images)
According to GB News, the scenario is being phased out after researchers concluded it no longer reflects the most plausible trajectory based on renewable energy growth, emissions trends and climate policies.
Researchers writing in the journal Geoscientific Model Development said future climate scenarios should continue to cover a wide range of outcomes, from severe warming to futures with lower emissions.
“For the 21st century, this range will be smaller than previously assessed: at the upper end of the range, high emission levels (quantified by SSP5-8.5) have become implausible, based on trends in renewable energy costs, the emergence of climate policy, and recent emissions trends.”
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Trump's post follows comments he made last September at the UN General Assembly in New York, where he called climate change a “scam.”
“In my opinion, it's the biggest scam ever perpetrated in the world,” Trump said at the time. “All of these predictions made by the United Nations and many others, often for bad reasons, were wrong.”
“They were made by stupid people who cost their country a fortune and gave those same countries no chance of success,” he continued.
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President Donald Trump speaks during the United Nations General Assembly in New York on Sept. 23, 2025. Environmental and energy groups called on the Trump administration to boycott the U.N. Climate Conference in November, according to a letter obtained by Fox Digital. (Michael Nagle/Bloomberg)
Trump's comments drew criticism from Democrats, including former Secretary of State Hillary Clinton, who called the comments “total disinformation.”
“You know, yesterday at the UN, President Trump said, 'Climate change is a hoax,' because it's just total disinformation,” Clinton said during the Clinton Global Initiative in New York. “It's a claim that's simply not true, and yet it's spreading.”
EPA Administrator Lee Zeldin later defended Trump's climate comments in an interview with Fox News.
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President Donald Trump speaks during the 80th session of the United Nations General Assembly at United Nations Headquarters in New York City on September 23, 2025. (Chip Somodevilla/Getty Images)
“The president is absolutely right and we've seen it in the name of climate change, these left-wing policies willing to cause extreme economic pain to people who can at least afford it,” he said.
Fox News Digital's Emma Colton contributed to this report.
