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March 27, 2025
The International Energy Agency has just published its Global Energy Review 2025. In this post I share the five most important take-aways I see in the report. I encourage you to have a look at the full report for IEA’s interpretation of its top conclusions. Let’s jump right in . . . Have a look at the figure…
March 12, 2025
The DC Court that heard the defaation case brought by climate scientist Michael Mann against two bloggers has ruled today that Mann and his lawyers acted in “bad faith” during the case, by presenting false claims on multiple occasions related to Mann’s grant funding: Here, the Court finds, by clear and convincing evidence, that Dr. Mann, through…
March 12, 2025
I was a tenured full professor at the University of Colorado Boulder for almost 24 years. At the end of 2024, I left. Officially, it was a voluntary departure. But I sure felt like I’d been pushed out. My story started in 2015, when Rep. Raúl Grijalva (D–Ariz.) asked the university to investigate me. He alleged that…
March 5, 2025
I was speaking to a non-US non-climate beat reporter yesterday about undeniable issues of scientific integrity in climate science and he asked a question about the climate science community that got my attention: “And no one cares? Aren’t scientists supposed to care about such things?” Lapses of scientific integrity in climate science have become normalized….
February 27, 2025
Earlier today, The Washington Post reported that head of the Environmental Protection Agency (EPA), Lee Zeldin, has urged the Trump administration to rescind the EPA’s 2009 “endangerment finding” on greenhouse gases. The Post reports: Environmental Protection Agency Administrator Lee Zeldin has privately urged the White House to strike down a scientific finding underpinning much of the federal government’s push to combat…
February 12, 2025
An important new paper published this week in Nature Communications looks at the historical record of fire in North America — A fire deficit persists across diverse North American forests despite recent increases in area burned. Parks et al. find that large fires of recent decades in North America are not unprecedented: Our study of 1851 tree-ring fire-scar…
February 10, 2025
The term “scenario” was introduced by a group of researchers at the RAND Corporation in the 1960s. Herman Kahn explained its origin in 1979: “We deliberately chose the word [scenario] to deglamorize the concept . . . There is no a priori concept that a scenario should be taken seriously or that it is intended to reflect aspects…
February 3, 2025
Long-time readers of THB will know well that I am strongly supportive of formal scientific assessments — a form of science arbitration, as defined in my book which gives this site its name. Scientific assessments are essential for understanding what relevant experts collectively think they know, what they think they don’t, along with surfacing uncertainties, disagreements, and…
January 17, 2025
Did you know that climate change is making the San Francisco region more foggy? The Bay Area just had its foggiest May in 50 years. And thanks to global warming, it’s about to get even foggier. Did you also know that climate change is making the San Francisco area less foggy? Declining fog cover on California’s coast…
January 8, 2025
The Office of the Solicitor General — part of the Department of Justice —was created by the Statutory Authorization Act of June 22, 1870. The Act states that there shall be an officer “learned in the law,” to be called the Solicitor General, to assist the Attorney General in the performance of his or her duties. The…