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Unforced Variations: Aug 2025

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This month’s open thread. Please try and stay focused on substance rather than personalities. There are many real issues that are particularly salient this month, and so maybe we can collectively try not to have the comments descend into tedium.

Note: Moderation will be applied to over-frequent and pointless commenters (you know who you are, and no, we don’t care to argue about it).

Are direct water vapor emissions endangering anyone?

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In the EPA EF reconsideration document there is a section on p62 where they attempt to make the argument that the CO2 endangerment finding would also apply to direct water vapor emissions to the atmosphere, which is (according to them) obviously absurd. But both claims are bogus.

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The Endangerment of the Endangerment Finding?

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The EPA, along with the “Climate Working Group” (CWG) of usual suspects (plus Judith Curry and Ross McKitrick) at DOE, have just put out a document for public comment their attempt to rescind the 2009 Endangerment Finding for greenhouse gas emissions.

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National Climate Assessment links

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For some reason, it has become hard to locate the various National Climate Assessments (NCAs) that have been produced by the USGCRP over the decades (and it’s pretty hard to find the USGRCP as well…). However, the reports are still accessible if you know where to look. So for future reference, here are all the links (and we’ve downloaded the pdfs locally so that they will always be available here).

NCA1 (2000)

NCA2 (2009)

NCA3 (2014)

NCA4 (2017)

NCA5 (2023)

NCA6

There is no ongoing NCA6 process, even though it is mandated by Congress to be completed over the next few years. We’ll let you know if that changes.

Melange à Trois

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In honor of the revelation today, that Koonin, Christy and Spencer have been made Special Government Employees at the Dept. of Energy, we present a quick round up of our commentary on the caliber of their arguments we’ve posted here over the last decade or so.

TL;DR? The arguments are not very good.

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