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December 4, 2025
A Huge Retraction, the Usual Playbook, and Reason for Optimism
Some huge news dropped today that will reverberate through climate science and policy. Nature has finally retracted “The Economic Commitment of Climate Change,” by Kotz et al. (KLW24), more than 18 months after first learning that the paper was fatally flawed, with the authors acknowledging that its errors are “too substantial” for a correction. It is not just the retraction…
December 2, 2025
Comment to the Environmental Protection Agency: Visibility Protection: Regional Haze State Plan Requirements Rule Revision
Summary: The federal Regional Haze Program should be repealed or at a minimum scaled back dramatically so as to return haze policies to the states as reflected in their respective implementation plans. The clear intent of Congress in the Clean Air Act as amended was to create a system of cooperative federalism for environmental protection,…
December 1, 2025
THB Insider #28 – Thanksgiving Reading
It is Thanksgiving Day here in the US — My favorite holiday. Chez les Pielke we are getting ready to put the turkey in as the sun rises. We will have a big table of family and are looking forward to a fun day with family, football, food, and joy! Last year, on this day…
December 1, 2025
US Hurricanes 2025 in Review
For the first time in a decade, the continental United States experienced no hurricane landfalls.1 Islands in the Caribbean saw multiple landfalls [1], notably Hurricane Melissa’s landfall as a Category 5 storm in western Jamaica, which resulted in more than 100 deaths in the region and about $10 billion in losses. The usual media script was played —…
November 24, 2025
The Battle for Climate Science and Policy Past—And Why It Matters
Last week in Belém, Brazil the 30th Conference of Parties to the U.N Framework Convention on Climate Change (UNFCCC) concluded with little accomplished, according to most observers. Perhaps the most significant accomplishment was formalizing a fully Orwellian characterization of the recent history of climate policy — See my post last week for why the UNFCCC characterization of moderating…
November 20, 2025
Reassessing the World’s Climate Victories: The Paris Delusion
In 2015 in Paris, countries from around the world agreed to accelerate the decarbonization of their economies in response to climate change. According to the United Nations Framework Convention on Climate Change (UNFCCC), implementation of the Paris Agreement over the past decade has been a runaway success story, moving the world away from what would…
November 17, 2025
The Last Gasp of the Climate Thought Police
Following my lecture last week at Cornell, one Cornell professor, a well-known climate activist, called for the firing of the director of the Cornell Atkinson Institute for Sustainability — an accomplished scientist himself — simply for hosting my visit. Gavin Schimdt, a NASA scientist and another well-known climate activist, took to social media to complain that I had cited…
November 17, 2025
Congress Can Help Update our Infrastructure by Passing the SPEED Act
The National Environmental Policy Act of 1969 is the basic law governing federal reviews of construction projects’ environmental impacts. Unfortunately, it has evolved into an environmentally destructive monstrosity. Why? Because the left-wing environmentalists have used it in endless litigation to oppose even projects that clearly would yield important environmental improvements over existing infrastructure. New infrastructure…
November 14, 2025
Science Evolved. The Narrative Didn’t.
I spent this week in Ithaca, New York visiting Cornell University. It was a fantastic visit. I met with faculty, researchers, students, staff, administrators, and taught a few classes. I was warmly welcomed and had a chance to discuss, debate, listen, learn, agree, disagree, and break bread with many colleagues. In short, my visit revealed…
November 12, 2025
When Less Warming Means More Fear
Something curious is going on in the world of climate advocacy. As THB readers know, projected future carbon-dioxide emissions from fossil-fuel combustion have been consistently revised downward in recent years, resulting in less projected warming. Yet rather than acknowledge this encouraging development, climate campaigners have shifted the goalposts by lowering the threshold of what they…