this post was submitted on 28 Apr 2026
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Climate

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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.

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

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

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Renewable energy just broke a 100-year-old streak | Coal’s century at the top of the world’s power mix is over. (www.vox.com)
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[–] ParlimentOfDoom@piefed.zip 5 points 2 weeks ago (3 children)

Wind is just solar with extra steps.

[–] Malgas@beehaw.org 7 points 2 weeks ago (1 children)

Technically so are fossil fuels.

…lots and lots of extra steps.

[–] logi@piefed.world 1 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

That's all just nuclear fission with even more steps.

Are there perhaps only two primary power sources: fission (in stars for now) and fusion (on Earth)?

[–] Egonallanon@feddit.uk 5 points 2 weeks ago (2 children)

Other way around. Stars produce energy through nuclear fusion, nuclear reactors produce energy through fission.

[–] Malgas@beehaw.org 1 points 2 weeks ago

And if we want to be really precise about where energy comes from, it's worth noting that all elements heavier than hydrogen (i.e. all if them) are the result of stellar fusion. Up to iron in the main phase, and anything heavier in supernovae, neutron star mergers, and possibly other extremely violent events. So fission is extracting the stored energy of dead stars.

Ultimately, it's probably all just residual energy from the Big Bang.

[–] logi@piefed.world 1 points 2 weeks ago

Right, sorry, slip of the ginger.

[–] eleitl@lemmy.zip 3 points 2 weeks ago (1 children)

Potential energy and tidal are gravitational.

[–] logi@piefed.world 1 points 2 weeks ago

Tidal is really feeding off the momentum of the planet, but yeah, that's not nuclear.

Potential energy... that's more a storage medium.

Perhaps we need to add the original energy of the big bang to nuclear. That threw things apart so they could have potential energy, and it gave a lot of matter a lot of momentum which gets topped up occasionally by a nuclear exploding star.

[–] Aurenkin@sh.itjust.works 1 points 2 weeks ago (2 children)

All energy is solar with extra steps really

[–] Coldcell@sh.itjust.works 1 points 2 weeks ago

I was about to point out nuclear, but I suppose in a way that's just going straight to the source.

[–] Nighed@feddit.uk 1 points 2 weeks ago

All energy is nuclear with extra steps.

[–] NotEasyBeingGreen@slrpnk.net 0 points 2 weeks ago

Written like someone who lives in a sunny place... 😉