this post was submitted on 17 Aug 2023
35 points (94.9% liked)

Climate - truthful information about climate, related activism and politics.

5197 readers
663 users here now

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.

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

founded 1 year ago
MODERATORS
 

First post on the fediverse. Hopefully it auto loads the link photo but if not I'll put it as the first comment. Sorry for anything incorrect in handling this.

top 16 comments
sorted by: hot top controversial new old
[–] buckykat@lemmy.blahaj.zone 12 points 1 year ago (2 children)

Convincing greens to be anti-nuclear is one of the greatest tricks the fossil fuel industry ever pulled

[–] moosepuggle@startrek.website 8 points 1 year ago (1 children)
[–] schroedingershat@lemmy.world 1 points 1 year ago* (last edited 1 year ago) (1 children)

The oil and gas industry switched to the other side of that battle decades ago when they realised there was nowhere near enough high concentration U235 to make a difference and the alternative involved wind and solar thermal eating at least half their business (as wind and PV did, very nearly immediately, within 12 years of finally getting a tiny fraction of thebsubsidies nuclear recieved).

Coal power barons were on the other side from the second they started scamming tax payers to buy nuclear plants for them to have a monopoly on.

[–] greengnu@slrpnk.net 1 points 1 year ago (1 children)

you don't need U-235 for nuclear power. In fact a Liquid Thorium-Fluoride thermal breeder reactor would be a more industrially useful nuclear design and Th-232 is available to power our civilization for a billion years (assuming no growth in energy consumption)

[–] schroedingershat@lemmy.world 1 points 1 year ago* (last edited 1 year ago) (1 children)

Sure, just like you don't need sunlight for PV because the ground emits IR at night (except the latter has actually been tested to completion at least once and works so is merely impractical rather than also fictional). No remotely viable breeding program has existed and no reactor has ever even run on the same material it transmutes from a non-fissile element.

Distractions about completely unrelated and completely technically and politically untenable technogies with half a proof of concept of the easy part don't change the fact that U235 limits the application of LWRs (the only reactor type anyone ever suggests building) to a small side-niche.

[–] greengnu@slrpnk.net 1 points 1 year ago (1 children)

The breeder part is the production of U-233 (which is then fissioned and used to provide the neutrons for converting Th-232 into U-233 (with a chemical separation and decay storage step in between)) which although has a tight neutron economy is viable.

Working reactors for such designs were funded by the US airforce and they did operate as expected.

If you wish to argue that one will need U-235 as a startup fuel or that there are technical problems in large scale energy production it is not yet able to address, I would definitely agree on that; the technology needs more research before we depend upon it and that Uranium light water reactors are likely to be the running standard until such time and needed investment occurs. But we have enough U-235 in nuclear waste stockpiles to fuel our civilization for a thousand years to work out the details.

[–] schroedingershat@lemmy.world 1 points 1 year ago* (last edited 1 year ago)

I know the theory and all the half-experiments. None ran a full load of fuel or reached steady state isotope mixture. None ran on what they bred. None even pretended to have a sustainable or economical separation process. It's scifi.

Accessible (ore as or more more energy dense than low grade lignite that isn't buried so deep it can't be extracted without emittingnmore than just using fossil gas) U235 resources assumed to exist (not found) are years to a couple of decades for the world's 2030 energy needs. Developing every known resource now would have zero impact on a net zero timescale. Even at current costs the raw uranium to run an SMR is at price parity with the module part of a PV installation.

Stop with the damn lies.

[–] MrMakabar@slrpnk.net 3 points 1 year ago

Even better they convinced a bunch of people that all other green ideas are stupid, due to greens being anti nuclear. Hence they get both, no nuclear and no renwables, evs, public transport and the other sensible ideas of the greens.

[–] sin_free_for_00_days@sopuli.xyz 4 points 1 year ago (2 children)

Link looks fine. I wish that it was just deaths from air pollution. I can't imagine "accidents" being that much of an impact.

[–] MrMakabar@slrpnk.net 3 points 1 year ago (1 children)

For nuclear it does, depening how many cancer deaths have been caused by mainly Chernobyl. That is however massivly disputed, as it thankfully only ever happend once and well the Soviets had no intresst in actually being honest about that. Depending on the measures that can be thousands of deaths, due to an accident.

[–] schroedingershat@lemmy.world 1 points 1 year ago* (last edited 1 year ago)

The "accidents" (or rather intentional genocide) involving native americans, uzbeks, siberians, nigerians, and lower caste indians in the upstream of the fuel cycle dwarf chernobyl by at least an order of magnitude. Still not rivalling the coal or oil industry, but not far off.

[–] VikingHippie@lemmy.wtf 2 points 1 year ago

Idunno, lots of deadly accidents amongst coal miners and offshore oil rig workers, to name a couple..

[–] TheFriendlyDickhead@lemm.ee 3 points 1 year ago

This is sad. After all humanity doesn't care about a humans life, if they save money.

[–] schroedingershat@lemmy.world 2 points 1 year ago* (last edited 1 year ago) (1 children)

Can people stop linking to this fractally garbage 15 year out of date source already? The sovacool study is garbage (anything from sovacool is so methodologically garbage it discredits his point even though he's often coincidentally right for unrelated reasons). Arbitrarily rejecting its numbers for one particular power source and switching to one with another methodology is worse. The renewable technology referenced is nothing like what is used now. It completely ignores the primary source of ongoing harm for everything except fossil fuels (and those too in the long run).

[–] Thrawn@lemmy.dbzer0.com 1 points 1 year ago (1 children)

Do you have a better source for death rate or similar relative to the actual amount of energy generated? Happy to compare if you do. Not trying to push this as a be all data source and happy to replace it with a better one if available.

[–] schroedingershat@lemmy.world 1 points 1 year ago

What you're after is an LCA of a specific instance of new technology (which attempts to measure the sources of harm in context) rather than a context-stripped summary of a complex subject drawing arbitrary lines designed to create a bad faith talking point. Anyone reducing it to a single number is making a bad faith propaganda point one way or the other. You won't find any credible version of it because it's not a credible exercise.

The uranium that feeds the canadian project (excluding the historical tens of thousands of native deaths from intentional waterway poisoning) is harmless compared to what is happening in Arlit or Adapa (the harms of which are just beginning and are actively covered up). All estimates (by anti-nuclear advocates or by nuclear shills) of chernobyl are poor. Arbitrarily excluding santa susanna or windscale or mayak is done without reason. The risk profile of a 200kW wind turbine is vastly different to a 3MW one or a 15MW offshore one. Utility solar is nothing like rooftop. Countries with mandatory working at height safety equipment have vastly different risk profiles than those without.

Acknowledge that the harms are low for the bottom four options if they are done properly, then actually enforce doing them properly rather than using it as ammo to justify the horiffic (and rising) pollution from uranium milling, mining and plutonium extraction whilst exaggerating having one person die in an entire country's utility solar program. And also treat mining for rare earths for either magnets or obsolete USA-based thin film solar or burnable neutron poison the same way holding both to the exact same standards per unit of energy.

Treat all waste from all options the same way (non-recycled waste must be only a few dozen kg per lifetime of energy and it must be permanently dealt with before profit is disbursed).

Treat danger from all options the same way. Disaster cleanup (be it oil spills or radiation or a dam burst) must be fully collaterised with no liability limit from assets that won't crash if something happens.