this post was submitted on 24 May 2025
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

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It's worth noting that he also fired many of the staff who know how to ensure that they're actually safe, as well as the staff who would approve financing.

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[–] skozzii@lemmy.ca 10 points 4 days ago (1 children)

Individually alot of his ideas could be good, with proper care and planning. Instead he does them all at once without any sort of considerations, its wild to witness this train wreck.

[–] moseschrute@lemmy.world 2 points 4 days ago

Idk how tariffs work but I like to imagine in our economic toolbox they are like a hammer. Can a hammer be useful, absolutely. But is it useful to throw 10,000 hammers at the rest of the world like trump is doing?

[–] Aurenkin@sh.itjust.works 52 points 6 days ago

If there's one thing that you should compromise on when it comes to nuclear power it's definitely safety.

[–] umbrella@lemmy.ml 19 points 5 days ago

great idea, nothing wrong will come from pressuring the nuclear power regulators. nuh uh.

[–] collapse_already@lemmy.ml 7 points 4 days ago (2 children)

I am sure making consideration of climate change impacts illegal during the approval process won't have adverse consequences. When the water used to cool the reactor dries up, we'll have plenty of money and foresight to just pump it in from somewhere else, right?

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[–] hydrashok@sh.itjust.works 29 points 6 days ago* (last edited 6 days ago)

Hey good news everyone, instead of 40 years to build a new reactor, it’ll only take 39 years. What a relief. Good thing we didn’t fall for all that free sunlight and wind bullshit!

Hey, maybe nuclear plants can run on clean coal!

[–] GissaMittJobb@lemmy.ml 23 points 6 days ago (53 children)

Beginning investments nuclear at this point when renewables so obviously to everyone in the know are beating them on all accounts is extremely on brand for someone as dumb as Trump

[–] Vytle@lemmy.world 12 points 5 days ago (3 children)

Nuclear is the single best technology humans have invented. A broken clock is right twice a day.

[–] GissaMittJobb@lemmy.ml 18 points 5 days ago (5 children)

Being able to harness the power of atoms is cool, but directly harnessing the power of a star is arguably far cooler.

[–] mycelium_underground@lemmy.world 5 points 5 days ago (6 children)

I'm confused as to what you think powers a star.

[–] Tetragrade@leminal.space 4 points 5 days ago (3 children)

solar panels, duhh. why'd you think they were called that?

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[–] shalafi@lemmy.world 2 points 4 days ago (1 children)

OP means fusion power vs. fission.

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[–] uniquethrowagay@feddit.org 3 points 4 days ago (1 children)

Nuclear doesn't scale globally and it's not renewable. It's contribution to humankind's power generation negligible and it will stay that way.

[–] FauxLiving@lemmy.world 2 points 4 days ago

not renewable

I mean that may be true, but the amount of easily available fuel for fission reactions is several orders of magnitude greater than that of fossil fuels.

https://www.scientificamerican.com/article/how-long-will-global-uranium-deposits-last/

According to the NEA, identified uranium resources total 5.5 million metric tons, and an additional 10.5 million metric tons remain undiscovered—a roughly 230-year supply at today's consumption rate in total. [...] First, the extraction of uranium from seawater would make available 4.5 billion metric tons of uranium—a 60,000-year supply at present rates. Second, fuel-recycling fast-breeder reactors, which generate more fuel than they consume, would use less than 1 percent of the uranium needed for current LWRs. Breeder reactors could match today's nuclear output for 30,000 years using only the NEA-estimated supplies.

This is only for uranium-based reactors. Thorium can also be used in fission reactors and is 3 times more common than uranium.

In 360,000 years, I'm sure we'll find a new way to make energy. Which is to say that we'll probably perfect fusion confinement.

Fusion:

https://physics.stackexchange.com/questions/164282/how-much-potential-fusion-energy-is-in-earths-ocean#164291

Some rough estimates (you can dig up more accurate numbers): The oceans contain about 321 million cubic miles of water (source: http://oceanservice.noaa.gov/facts/oceanwater.html), or 3.5e20 U.S. gal.

1 gal seawater contains roughly enough deuterium to provide the same energy as 300 gal of gasoline (maybe slightly less - that's the part for your homework!), so the oceans are equivalent to 1.1e23 gal. gasoline.

Conversion factors: 1 gal. gasoline = 1.24e5 Btu; 1 Btu = 1055 J; 1e15 Btu = 1 quad; U.S. annual energy consumption is a little under 100 quad; world annual consumption is about 500 quad.

So, the oceans contain about 1.3e28 Btu = 1.4e31 J of fusion fuel, which is 1.3e13 quad, which is enough to supply energy at the current rate of consumption for 26 BILLION years.

Worrying about the amount of nuclear fuel available is about a sane as worrying about how the porch that you built on your house will affect the orbit of the Earth over the next 3 billion years. Technically it will affect things, but the timescales involved are so much longer than anything humanity deals with.

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[–] nuko147@lemm.ee 2 points 4 days ago (1 children)

Nuclear is needed for the AI tech industry. He doesn't give a fuck what the people need. These are pushes from META, Google, Amazon and Open-AI. But guess who is gonna pay.

[–] GissaMittJobb@lemmy.ml 2 points 4 days ago (3 children)

AI needs large amounts of cheap power. Nuclear does not deliver on those requirements - vast quantities of renewables would be far more suitable for this purpose. However, renewables are woke and as such Trump would never lean into them, no matter how profitable it would be.

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[–] Ton@lemmy.world 4 points 4 days ago (1 children)

Great, more power at unrealistic prices in… 2045.

[–] eleitl@lemm.ee 2 points 3 days ago

Don't fret, these will never become operational anyway.

[–] Archangel1313@lemm.ee 17 points 6 days ago

The one fucking thing you never want to cut corners on, and this clown is deregulating it. JFC.

[–] Blackmist@feddit.uk 5 points 5 days ago

Quite glad that America is far away from where I am.

[–] AmazingWizard@lemmy.ml 11 points 5 days ago* (last edited 5 days ago) (1 children)

It really depends on what these reactors are going to be used for. Are they going to be licensed to private corporations to power data centers, or are they going to provide power to citizens homes?

[–] Korhaka@sopuli.xyz 2 points 4 days ago (5 children)

What prevents the approval of the reactors, is it bad designs or just a case of planning permission delays because people don't want a nuclear reactor built. Surprised to see Trump being in favour as nuclear as he normally seems to favour the oil industry.

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[–] Steve@communick.news 6 points 6 days ago

We need to work on permitting of New plants. Not new construction of Old plants.

But I get it, Don likes towers.

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