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Dan Schroeder

@dvschroeder.bsky.social

Physicist, educator, number-cruncher. Cartoon by the great Cal Grondahl. physics.weber.edu/schroeder

828 Followers  |  204 Following  |  2,319 Posts  |  Joined: 22.08.2023  |  2.2131

Latest posts by dvschroeder.bsky.social on Bluesky

Doesn't even try. Sheesh.

That was what bugged me about Klein and Thompson, come to think of it. On the first page they promise carbon-free electricity so cheap you can scarcely find it on your monthly bill. The book ends before they make the slightest attempt to check whether that's plausible.

16.02.2026 23:55 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The political blunders are fascinating, but so are the science and technology blunders. He has no credentials in science/engineering, right? Does he appear to have done any serious research into science/technology or is he just parroting Elon's late-night ramblings?

16.02.2026 23:36 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Chart of 12-month running totals of world electricity generation by source, from January 2020 through November 2025. The largest three sources during this time period are coal, gas, and hydro, in that order, with wide gaps between them and relatively little recent change. The next three are nuclear, wind, and solar, but nuclear has held steady while wind has increased and solar has increased even faster, so by November 2025 they are nearly in a three-way tie, with the order soon to become solar, wind, nuclear. The three minor sources, now far below solar, are other fossil (mostly oil), bioenergy, and other renewables (mostly geothermal).

Chart of 12-month running totals of world electricity generation by source, from January 2020 through November 2025. The largest three sources during this time period are coal, gas, and hydro, in that order, with wide gaps between them and relatively little recent change. The next three are nuclear, wind, and solar, but nuclear has held steady while wind has increased and solar has increased even faster, so by November 2025 they are nearly in a three-way tie, with the order soon to become solar, wind, nuclear. The three minor sources, now far below solar, are other fossil (mostly oil), bioenergy, and other renewables (mostly geothermal).

Hydro is about 14% globally.

A naive extrapolation from Ember's monthly data suggests wind will exceed nuclear for the year 2026. This could be wrong, but if it's right, then nuclear will be behind hydro, solar, and wind.

16.02.2026 23:03 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks!

16.02.2026 15:39 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
U.S. military flew a small nuclear reactor to Utah. Here’s what it means for the Beehive State. A small nuclear test reactor arrived in Utah aboard U.S. military aircraft. It won’t power homes, but state and federal leaders say it signals a new chapter for Utah’s energy future. Here’s what to kn...

I remain doubtful that Valar Atomics will ever produce a commercial productβ€”whether or not they manage to turn on this 250kW (thermal?) test reactor by 7/4. It's telling that they're talking about niche off-grid applications rather than competing in the grid business.

www.sltrib.com/news/politic...

16.02.2026 15:03 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I wrote a bit about it in the essays linked below, but I'm a humorless pedant. Someone really oughta have some fun with it.

especiallyfuture.blogspot.com/2022/11/the-...

especiallyfuture.blogspot.com/2023/01/ener...

16.02.2026 14:25 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Have you done this to the flying cars book?

16.02.2026 14:08 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Brief excerpt from NYTimes article (https://www.nytimes.com/2026/02/16/climate/endangerment-finding-auto-emissions-regulations.html): "The United States will essentially have no laws on the books that enforce how efficient America’s passenger cars and trucks should be."

Brief excerpt from NYTimes article (https://www.nytimes.com/2026/02/16/climate/endangerment-finding-auto-emissions-regulations.html): "The United States will essentially have no laws on the books that enforce how efficient America’s passenger cars and trucks should be."

Was there ever a consensus in the US that we should regulate vehicle efficiency for the sake of climate (or for other environmental reasons)? Or was it merely a fragile alliance of environmental interests and "energy independence" hawks, the latter having vanished now that we're a net oil exporter?

16.02.2026 14:01 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I'd sincerely like to know whether the book has any redeeming qualities. Hardly anyone is wrong about everything. Anything at all that's genuinely insightful and hasn't already been said a hundred times?

15.02.2026 19:39 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Yeah but the more granularity you try to add, the worse the issue of imports/exports gets. To paraphrase @solarchase.bsky.social, energy footprint calculation is a scientific and sometimes philosophical pain.

15.02.2026 18:42 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I don't know of a single handy chart.

Malanima's dataset includes trad. biomass by region and selected countries: histecon.fas.harvard.edu/energyhistor...

OWID has an attempt at consumption-based energy accounting but it doesn't include Qatar, Iceland, etc.: ourworldindata.org/energy-offsh...

15.02.2026 18:33 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

There's a wide spread in energy use per person across the world, but charts like this exaggerate it.

Some small countries just happen to have energy-intensive export industries.

Meanwhile these data exclude traditional biomass, the main energy source in poor countries. πŸ”ŒπŸ’‘

15.02.2026 16:44 β€” πŸ‘ 9    πŸ” 2    πŸ’¬ 2    πŸ“Œ 0
Chart from https://ember-energy.org/data/electricity-data-explorer/?entity=Cuba&fuel=res showing annual electricity generation from renewable sources in Cuba from 2000 through 2023. The total has ranged from just over 1 TWh in 2002 down to just under 0.5 TWh in 2005. The largest share is bioenergy, which has declined significantly since 2000. Solar generation has grown to make up for much, though not all, of the decline in bioenergy. Hydropower has fluctuated over the years with no obvious long-term trend. Wind power has grown but remains the smallest of the four renewable electricity sources.

Chart from https://ember-energy.org/data/electricity-data-explorer/?entity=Cuba&fuel=res showing annual electricity generation from renewable sources in Cuba from 2000 through 2023. The total has ranged from just over 1 TWh in 2002 down to just under 0.5 TWh in 2005. The largest share is bioenergy, which has declined significantly since 2000. Solar generation has grown to make up for much, though not all, of the decline in bioenergy. Hydropower has fluctuated over the years with no obvious long-term trend. Wind power has grown but remains the smallest of the four renewable electricity sources.

The Reuters article refers to a "shift toward renewable energy" but doesn't elaborate. Maybe they mean solar+wind, or maybe they think electric vehicles automatically use renewable energy.

Ember says Cuba's biggest renewable electricity source is actually bioenergy, which is on the decline.

14.02.2026 16:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Construction on the Faraday solar farm began in 2023. It should have appeared in EIA listings even earlier, yet it never did. The fault may lie with EIA or with the developers, but I don't see how we can blame it on the current administration.

14.02.2026 02:03 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

So in case I wasn't clear, I'm just wondering whether there's a similar way to summarize in a sentence (or a paragraph) how randomness and probabilities enter the DQD theory and its derivation of Born's rule.

14.02.2026 00:02 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

So in the pilot-wave theory the randomness of Born's rule is built into the initial conditions.

In spontaneous collapse theories it comes from some kind of new physics.

In Copenhagen it's an axiom, I guess.

In many worlds they claim to derive it, though I don't see how they could.

13.02.2026 23:58 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 3    πŸ“Œ 0

Then maybe I'm misunderstanding what you mean by "quantum theory itself". Presumably that includes the time-dependent SchrΓΆdinger equation. Does it also include the Born rule?

I guess I thought the goal was to somehow derive the Born rule from the TDSE.

13.02.2026 22:32 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Is there an easy way to summarize, in this view, where the randomness (or perhaps apparent randomness?) of quantum mechanics comes from?

13.02.2026 21:07 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Here's another half GW of solar that is inexplicably still omitted from the EIA listings. bsky.app/profile/dvsc...

13.02.2026 01:40 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Ah, I see. Thanks!

12.02.2026 23:55 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

But there's no data for 2025 at that link.

12.02.2026 23:21 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

700 jelly donuts

11.02.2026 15:26 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Without discounting the importance of politics, I have to wonder what Iowa would even do with more wind power. Surely the bigger obstacle must be getting the power out of the middle of the country and to the distant population centers that can use it (also made difficult by politics). πŸ”ŒπŸ’‘

10.02.2026 00:12 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 1
Tweet from Elon Musk on Sep 7, 2024:

"The first Starships to Mars will launch in 2 years when the next Earth-Mars transfer window opens.

"These will be uncrewed to test the reliability of landing intact on Mars. If those landings go well, then the first crewed flights to Mars will be in 4 years.

"Flight rate will grow exponentially from there, with the goal of building a self-sustaining city in about 20 years. Being multiplanetary will vastly increase the probable lifespan of consciousness, as we will no longer have all our eggs, literally and metabolically, on one planet."

Tweet from Elon Musk on Sep 7, 2024: "The first Starships to Mars will launch in 2 years when the next Earth-Mars transfer window opens. "These will be uncrewed to test the reliability of landing intact on Mars. If those landings go well, then the first crewed flights to Mars will be in 4 years. "Flight rate will grow exponentially from there, with the goal of building a self-sustaining city in about 20 years. Being multiplanetary will vastly increase the probable lifespan of consciousness, as we will no longer have all our eggs, literally and metabolically, on one planet."

Just for reference:

09.02.2026 23:58 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
A tweet from Elon Musk, posted yesterday:

For those unaware, SpaceX has already shifted focus to building a self-growing city on the Moon, as we can potentially achieve that in less than 10 years, whereas Mars would take 20+ years. 

The mission of SpaceX remains the same: extend consciousness and life as we know it to the stars. 

It is only possible to travel to Mars when the planets align every 26 months (six month trip time), whereas we can launch to the Moon every 10 days (2 day trip time). This means we can iterate much faster to complete a Moon city than a Mars city.

That said, SpaceX will also strive to build a Mars city and begin doing so in about 5 to 7 years, but the overriding priority is securing the future of civilization and the Moon is faster.

A tweet from Elon Musk, posted yesterday: For those unaware, SpaceX has already shifted focus to building a self-growing city on the Moon, as we can potentially achieve that in less than 10 years, whereas Mars would take 20+ years. The mission of SpaceX remains the same: extend consciousness and life as we know it to the stars. It is only possible to travel to Mars when the planets align every 26 months (six month trip time), whereas we can launch to the Moon every 10 days (2 day trip time). This means we can iterate much faster to complete a Moon city than a Mars city. That said, SpaceX will also strive to build a Mars city and begin doing so in about 5 to 7 years, but the overriding priority is securing the future of civilization and the Moon is faster.

Have fun with that, Elon. A city on the Moon in ten years is somewhat less absurd than a city on Mars in twenty, but neither one is going to happen.

The tone here is interesting, though. Almost as if he heard someone criticizing his Mars plans recently…I wonder how that might have happened? 😁

09.02.2026 17:55 β€” πŸ‘ 60    πŸ” 10    πŸ’¬ 17    πŸ“Œ 0

Finally Utah begins to realize that all that talk about nuclear and geothermal power was a fantasy (and of course solar and batteries are off the table because that would be too woke). What they're actually gonna build is a load of new fossil gas power plantsβ€”and maybe restart the IPP coal units.

09.02.2026 20:47 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

In that case, maybe the state would have data you could compare to?

A discrepancy of that size would drive me nuts (if it were closer to home).

08.02.2026 19:00 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

When and where did you coin the term hydrogen soufflΓ©? Looking for something to cite if I want to refer to it (and web searches are inconclusive).

08.02.2026 17:45 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Fusion (with PV) will surpass fission this year, then go on to surpass hydropower in a few more years, then...

It's fun to watch this race, even though the ranking isn't what really matters. The "losers" can still contribute to the global energy mix.

08.02.2026 16:47 β€” πŸ‘ 17    πŸ” 0    πŸ’¬ 1    πŸ“Œ 1

Have you looked at whether there were similar adjustments to other states?

Have you looked at whether RI's commercial solar numbers (new or old) are comparable to other New England states?

07.02.2026 17:36 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

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