Climate scenarios are fundamental to climate research and policy. For more than a decade, one scenario dominated research informing discussions of climate among scientists and decision makers. Called RCP8.5, today that…
By Roger Pielke Jr. | April 10, 2025
Money grabs by politicians and ideological interest groups are nothing new, but the spate of recent proposals for climate “Superfund” laws — attempting to blame and tax the fossil energy…
By Benjamin Zycher | April 9, 2025
Last month, climate scientist Kate Marvel, of NASA, shared “something I have really struggled with” about extreme event attribution. She was speaking as an invited expert in a public information-gathering session of…
By Roger Pielke Jr. | April 7, 2025
Who uttered the quote that is the title of this post? A prominent climate activist, perhaps? Or maybe, a progressive Democratic member of Congress? No and no. The quote comes…
By Roger Pielke Jr. | March 31, 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…
By Roger Pielke Jr. | March 27, 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 Roger Pielke Jr. | 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…
By Roger Pielke Jr. | March 12, 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…
By Roger Pielke Jr. | March 5, 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:…
By Roger Pielke Jr. | February 27, 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…
By Roger Pielke Jr. | February 12, 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…
By Roger Pielke Jr. | February 10, 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…
By Roger Pielke Jr. | February 3, 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…
By Roger Pielke Jr. | January 17, 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…
By Benjamin Zycher | January 8, 2025
Yesterday, The Washington Post published what can only be described as a hit piece on the nominee for Secretary of Energy, Chris Wright. The Post took issue with Wright’s claim that: “[R]eports from the Intergovernmental Panel on Climate…
By Roger Pielke Jr. | December 6, 2024