Marcus C Sarofim
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marcusmarcusrc.bsky.social
Marcus C Sarofim
@marcusmarcusrc.bsky.social
Climate scientist, ex-EPA. Writing climate science & policy at The Saraph Report. Saraph, my name's root, means fire, which is appropriate for climate work. Interested in books, food, and contra dancing when not obsessing over carbon.
Multi-member districts with ranked choice voting is also a thing that could help with minority representation.
February 14, 2026 at 3:37 PM
I'd also be happy with more widespread use of the Alaska system with open primaries and ranked choice voting for a limited number of top candidates (though I might prefer 5 instead of Alaska's 4).
February 14, 2026 at 3:34 PM
An alternative to proportional representation is the "efficiency gap" from Nick Stephanopoulos, which might be more consistent with historical US electoral practice while also solving the key problems. Sadly, the Supremes found the concept too complicated. chicagounbound.uchicago.edu/public_law_a...
chicagounbound.uchicago.edu
February 14, 2026 at 3:32 PM
I wrote about the glaring flaws (legal and scientific) in the EPA’s Endangerment proposal here: substack.com/home/post/p-.... I doubt that the final reg will be much better though rumor is they gave up on the science. (I helped write and defend the original Finding)
A GHG Endangerment Finding story
I helped write it. I defended it. Now I'm watching them tear it down.
substack.com
February 13, 2026 at 2:09 AM
And the legal justification is almost as bad as the scientific one! substack.com/home/post/p-...
Reconsidering Reality
The Shoddy Case Against the Endangerment Finding
substack.com
February 12, 2026 at 10:55 PM
Thank you for linking to my writing!
February 12, 2026 at 10:54 PM
Science & Nature are also particularly interested in the exciting cutting edge of science... which is often less stable than the more pedestrian work of strengthening the foundations.
February 12, 2026 at 10:49 PM
Darn, I wanted that middle name! I guess you have a longer relationship with Endangerment than I do... but I spent many many hours with it at EPA. substack.com/home/post/p-...
A GHG Endangerment Finding story
I helped write it. I defended it. Now I'm watching them tear it down.
substack.com
February 12, 2026 at 10:46 PM
Yes. The Endangerment Finding survived in the DC Circuit in 2012 (they said it was "unambiguously correct"!), and the Court will absolutely thrash Trump EPA's repeal. I document some of the law & science flaws in the Trump EPA's proposal here: substack.com/home/post/p-...
Reconsidering Reality
The Shoddy Case Against the Endangerment Finding
substack.com
February 12, 2026 at 10:43 PM
And they don't only get the science wrong, they get the law wrong too. If you want to read more about it from someone who helped write and defend the finding, I have been documenting it on my substack: substack.com/home/post/p-...
Reconsidering Reality
The Shoddy Case Against the Endangerment Finding
substack.com
February 12, 2026 at 10:39 PM
Thank you for prioritizing the Finding when you were president. If you are curious about how it was in the trenches, I've written an EPA-scientist-eye view of the story of the finding here: substack.com/home/post/p-...
A GHG Endangerment Finding story
I helped write it. I defended it. Now I'm watching them tear it down.
substack.com
February 12, 2026 at 10:38 PM
Back in my day, we used to get everything up on the federal register by midnight of the day the reg was signed. Of course, back in my day, we used to believe in the rule of law, too...
February 12, 2026 at 10:36 PM
I would disagree that CAA HHG regs have been impact-less. They haven’t had the same impact as a strong economy wide law could have had, but they have resulted in substantial reductions (I have plans to do an analysis of the climate impacts of reductions estimated from RIAs of CAA GHG regs)
February 10, 2026 at 4:20 PM
3) Renewables will continue their penetration of the electricity market, just more slowly
4) This may reopen AEP v. Connecticut (en.wikipedia.org/wiki/America...), allowing public nuisance lawsuits if EPA is not regulation GHGs.
American Electric Power Co. v. Connecticut - Wikipedia
en.wikipedia.org
February 10, 2026 at 3:54 PM
1) the same orgs and States that were parties to Mass v. EPA will surely sue again. They will almost certainly win at the appellate level, the question is the Supreme Court does.
2) State regs are already in place: RGGI for the northeast, AB32 for California, actions in Oregon & Washington.
February 10, 2026 at 3:52 PM