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Posts by Jonathan Koomey

Some might even call it weird!

10 hours ago 0 0 0 0

I'm tolerating my cringe at watching myself on video to ask you to donate to WLP today! WLP made history this week, and the future of reproductive rights depends on people supporting their work! Even if you just have a few dollars, it is all appreciated! crm.bloomerang.co/HostedDonati...

12 hours ago 11 6 1 0
Trump: "Nothing bad can happen, it can only good happen. But with Tylenol, don't take it."
Trump: "Nothing bad can happen, it can only good happen. But with Tylenol, don't take it." YouTube video by The Bulwark

www.youtube.com/shorts/0zBki...

11 hours ago 0 0 0 0

"It would be really bad if they don't work out this Hormuz thing, so they'll figure it out some way" is still the prevailing attitude.

Can see it in markets, media, politicians, public.

Bad can't happen, people in charge know what they're doing, it's all content anyway.

I find it... unsettling.

15 hours ago 1022 196 50 19
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Promising climate progress from net-zero ambitions to the Paris Agreement goal - Nature Climate Change It is important to assess the gap between national climate ambitions and the goal of limiting global temperature increase. This multi-model analysis shows that if net-zero pledges are implemented, mee...

Current policies = 2.6–3.4°C by 2100
NDCs = 2.3–2.8 °C
Net-zero pledges = 1.8–2.1°C

Expanding + accelerating Net-Zero = 1.4–1.7°C, but 1.5°C (no overshoot) now unlikely

Mitigation driven by: ↓coal, ↑renewables (up to ~80% by 2050), electrification, and efficiency

www.nature.com/articles/s41...

19 hours ago 12 7 0 0

"""The core issue is not how old a child is, but how social media works,"" I said more or less so at the European Data Summit last week in Berlin :-)

16 hours ago 2 2 0 0

I am very sorry to this man’s family but we must have term limits. We can’t go on hoping we don’t lose our rights because octogenarians die or become senile. That has been the story of the last ten years.

15 hours ago 541 73 10 4
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CDC won’t publish report showing covid shots cut likelihood of hospital visits The report, which had cleared the agency’s scientific-review process, had been delayed. It now won’t be published at all, people familiar with the decision told The Post.

SCOOP: Two weeks ago, the head of the CDC delayed publication of a report showing covid vaccine cut likelihood of ER visits and hospitalizations by half. Now that report is no longer allowed to be published in CDC’s flagship scientific journal. My latest. 1/2
www.washingtonpost.com/health/2026/...

21 hours ago 3630 1965 72 133
Video

RFK Jr: "President Trump has a different way of calculating percentages. If you have a $600 drug and you reduce it to $10, that's a 600% reduction."

17 hours ago 5079 1267 1419 1692
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We explore these issues here: Koomey, J, and K Freund. 2024. Digital twins for digital infrastructure: The key to optimizing data center operations. Koomey Analytics and Cambrian AI Research. Sept. www.mediafire.com/file_premium...

16 hours ago 1 0 0 0

One more subtlety: The rated IT power of the data center in MW assumes that the IT installed exactly matches the design assumptions. This is almost never true in practice so most data centers have an actual maximum IT load that is lower than the rated power.

16 hours ago 1 0 1 0

On balance, though, the permitted emissions are very likely to be higher than actual emissions by a lot, even for power plants behind the meter supporting data center load most of the time.

16 hours ago 1 0 1 0

On the other side, the MW rating is just the IT load, so you also need to add in the infrastructure electricity use (fans, cooling, pumps, power distribution losses).

16 hours ago 1 0 1 0

Also, the MW given for data centers is a "nameplate" value that in most cases will never be reached (and for all will take some time to reach as they fill in the the IT equipment).

16 hours ago 1 0 1 0

This is true, but there are complexities even given the factor you mention. For behind the meter installations they'll need to keep some turbines "in reserve", so those won't operate much.

16 hours ago 1 0 1 0

Lot of people on the right crying about the Virginia redistricting vote.

We told you this would happen while you were celebrating the illegal off-cycle seat grab in Texas.

Stop playing stupid games if you don’t want to win stupid prizes.

21 hours ago 11536 2340 339 93

@jgkoomey.bsky.social: Emissions from efficient grid-connected gas plants could be 40-50% of permitted numbers. But off-grid data center emissions could be much closer to what is modeled on the permit application, given that they don't fluctuate based on the ebbs and flows of grid demand.

19 hours ago 1 1 1 0

also as @jgkoomey.bsky.social pointed out to me — there's still a lot of questions as to how actual vs permitted emissions will shake out when it comes to these big data center power plants, which operate differently than regular power plants!

19 hours ago 39 4 1 0
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New Gas-Powered Data Centers Could Emit More Greenhouse Gases Than Entire Nations A WIRED review of permits for data center projects using natural gas and linked to OpenAI, Meta, Microsoft, and xAI shows they could emit more than 129 million tons of greenhouse gases per year.

NEW: I've been shocked by some of the numbers I've been seeing on behind-the-meter power plants for data centers, so I did a little math.

less than a dozen gas plants being built to power data centers for big tech companies could emit a maximum of nearly 130 million tons of CO2e each year (!)

19 hours ago 1065 605 28 75

This post appeared under this Techmeme headline:

18 hours ago 7 3 0 0
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What I Learned About Billionaires at Jeff Bezos’s Private Retreat For the richest men on Earth, everything is free and nothing matters.

The special experience of being Jeff Bezos
www.theatlantic.com/magazine/202...

h/t @jgkoomey.bsky.social

1 day ago 2 3 0 1

The great thing about @volts.wtf in this interview with @robinsonmeyer.bsky.social is that you go in expecting to hear about oil prices, federal shenanigans, etc, but you get the juxtaposition of pastoralists vs promethians which I haven’t thought about since my env philosophy class 20 years ago

1 day ago 26 3 1 0

Natural gas (methane) comes with natural benzene. Right into your home for no extra cost. Financial cost, that is.

"it is generally considered that the only absolutely safe concentration for benzene is zero."

American Petroleum Institute report (1948) published with Harvard.

They knew.

1 day ago 33 15 0 1
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Oil Climate Index plus Gas Assessing Global Oil and Gas Emissions

Hey Ryan, you may find our oil climate index (+ gas) of use. Ping me if you want to know more. All public domain/open source data, peer reviewed, created by a stellar team. And yes, we've got lots of detail on California oil production. jon@koomey.com ociplus.rmi.org

1 day ago 1 0 0 0
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Contributor: Oil industry's wish list is not the way to help Californians The state should expand import infrastructure to protect against the refinery outages that disrupt our fuel supply.

Me and @nealemahoney.bsky.social are in the LAT today arguing that CA oil industry is trying to use the current crisis to jam through its deregulatory wishlist. Instead of caving, the state should use this moment to be a leader in the "mid-transition."

www.latimes.com/opinion/stor...

1 day ago 3 3 2 1

Yet again I remind everyone (as Elizabeth does in her very next tweet) that "foreigners are corrupting our pure blood with weakness & disease" is Fascism 101. Not some variant, not some metaphorically similar thing, not some echo -- the thing itself.

1 day ago 4188 1280 39 12
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impossible to overstate how poisonous this shit is. dudes on the street smiling and waving at your toddler are an indicator of a happy and functional community

1 day ago 3827 445 176 37
It’s in keeping with the basic idea of the original Colorado River Compact, which was to manage the basin’s water through some negotiation and compromise, rather than strictly following the letter of the law. But the legal foundation of prior appropriation hamstrings negotiations at every turn. Farmers account for the overwhelming majority of Colorado water use—almost a third goes to cattle feed alone—and thanks to how the system was initially designed, their prices are absurdly subsidized. One recent study found that while municipal districts pay an average of $512.01 per acre-foot, agricultural irrigation districts paid an average of $30.32 per acre-foot. Fully a quarter of all Colorado water diversions, all to farmers, cost nothing at all. Such a subsidy is difficult to unwind.

It’s in keeping with the basic idea of the original Colorado River Compact, which was to manage the basin’s water through some negotiation and compromise, rather than strictly following the letter of the law. But the legal foundation of prior appropriation hamstrings negotiations at every turn. Farmers account for the overwhelming majority of Colorado water use—almost a third goes to cattle feed alone—and thanks to how the system was initially designed, their prices are absurdly subsidized. One recent study found that while municipal districts pay an average of $512.01 per acre-foot, agricultural irrigation districts paid an average of $30.32 per acre-foot. Fully a quarter of all Colorado water diversions, all to farmers, cost nothing at all. Such a subsidy is difficult to unwind.

TIL that while Colorado basin municipal water districts pay an average of $512 per acre-foot, irrigation districts pay an average of $30--and fully a quarter of all water diversions, all going to farms, pay nothing at all prospect.org/2026/04/17/w...

2 days ago 606 105 10 22

Wish I could be state Sen. Louise Lucas's strongest soldier by voting today for her 10-1 House map. Old neighbors and friends in Virginia, make sure to cast a ballot; you can do so even if you first need to register. ↘️

1 day ago 60 14 1 0

This is already demonstrably incorrect. And Wright isn't even dead yet.

1 day ago 2637 386 117 7