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DOE Report Exposes Scientific Flaws In EPA’s CO2 Endangerment Finding

New DOE report calls EPA’s climate science into question amid major policy rethink.

by Dr. Roy Spencer
July 30, 2025, 8:24 AM
in Energy, Extreme Weather, News and Opinion, Politics, Science
Reading Time: 3 mins read
A A
2

DOE report mockup
Around 3 p.m. ET today, 29 July 2025, a Department of Energy report entitled “A Critical Review of Impacts of Greenhouse Gas Emissions on the U.S. Climate” will be made available here. [emphasis, links added]

This is the report providing the scientific basis for today’s announced decision by EPA Administrator Lee Zeldin to reconsider the 2009 CO2 Endangerment Finding.

The report has 5 authors: John Christy, Judith Curry, Steve Koonin, Ross McKitrick, and me.

We were asked by Energy Secretary Wright a few months ago to produce this report. As the first few pages of the report will explain, we had no pressure to come to any conclusions; we asked for complete autonomy.

Also, throughout this whole process, we did not know what the decision-makers at the EPA were going to do regarding energy policy.

We suspected the endangerment finding would be the topic of greatest interest, but we also knew that the EPA’s strategy for rescinding that could take a mostly legal approach, with little need for science arguments… for now.

Even today, I have no idea how much recent court rulings vs. updated (and less biased) science figured into the EPA’s decision.

Why a DOE Report to Support an EPA Decision?

My understanding is that the Trump administration and all of its executive branch agencies have been very busy on myriad issues.

Only one of the executive-level appointees in the administration had the background knowledge and interest to invest in making this science report happen: Energy Secretary Chris Wright.

SEE ALSO: Judith Curry on the New Climate Assessment Report from US DOE

I suspect (this is my reading between the lines) that between the White House, EPA, and DOE, it was agreed that Sec. Wright would take the lead on the science document.

Chris called me at home and asked me if I would participate, and he asked who I would recommend for other authors of the report. He had been following my research for many years. He also had on his list of potential contributors the others who now appear on the report with me.

During the preparation of the report, we decided to avoid any engagement with the press on what we were doing.

It would have only been a distraction, and we had little time to accomplish what the Obama Administration spent years and millions of dollars to produce as the original Technical Support Document (TSD) for the 2009 Endangerment Finding.

Our report has 141 pages, 350 references (most, if not all, peer-reviewed), 6.6% of which were studies we authored or coauthored. The report could not address every claim made in the 2009 Endangerment Finding’s TSD.

Instead, we focused on some of the central claims, the science underpinning them, and especially on the National Climate Assessments, especially NCA4 and NCA5 (the latest), which are relied upon by the U.S. Congress to assist in the making of laws and apportioning research funds.

One thing I learned through this process is how prolific and smart a researcher Ross McKitrick (U. of Guelph, Ontario) is. He was indispensable to our effort. But everyone brought their own experiences and opinions to the process, and we often had disagreements… but none that could not be quickly resolved.

Another thing I learned was just how poorly the science of climate change has been communicated to the public.

For example, if you follow Roger Pielke Jr’s research, you will know that most of what the public has been told about climate change and severe weather has been a lie — and Roger still considers human climate change to be an issue worth addressing.

It’s just not a “crisis”, and nothing we see in severe weather has been tied to human greenhouse gas emissions.

And that’s not a skeptical talking point, it’s according to the IPCC(!).

Read more at Roy Spencer’s Blog

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Comments 2

  1. Spurwing Plover says:
    2 months ago

    The EPA under Clinton(Bill)Obama and Biden abused its powers too much

    Reply
  2. Richard Greene says:
    2 months ago

    At 141 pages, the report is far too long for the general public.
    Most of the 2009 endangerment finding attack on CO2 was already eliminated by the Big Beautiful Bill. What we really needed now is a few page article on why CO2 is not a pollutant. Something the general public could understand.

    I generally agree with what I’ve read but there is no diversity of opinions. The effect of CO2 emissions on the climate in 100 years is unknown. A diversity of opinions is important.

    Carbon dioxide makes the earth warmer and makes plants grow better. That’s all anyone needs to know.

    I started reading the report at the link below.
    151 pages in PDF form.

    https://www.cfact.org/wp-content/uploads/2025/07/DOE_Critical_Review_of_Impacts_of_GHG_Emissions_on_the_US_Climate_July_2025.pdf

    The executive summary made sense, so I didn’t bother reading the other 150 pages.

    Reply

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