this post was submitted on 15 Aug 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.

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A massive new gas plant in Texas will be built with much less efficient technology than regular gas plants. It’s far from the only data center power project to rely on dirty turbines.

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[–] Successful_Try543@feddit.org 16 points 1 week ago* (last edited 1 week ago)

TLDR; They're building 'simple cycle' turbine plants, i.e. the sole power for generating electricity is produced by gas turbines only.
Today, combined cycle plants are state of the art, where the exhaust heat of the gas turbine is used in a second cycle in generating steam for steam turbines that again power generators.

[–] chiliedogg@lemmy.world 11 points 1 week ago

"Net Zero by 2040" is actually a fairly realistic goal since the AI bubble will burst WAY before then.

[–] Birch@sh.itjust.works 6 points 1 week ago

Can't have combined cycle, need that water to cool the datacenters 🤦‍♂️

[–] Jiggle_Physics@quokk.au 5 points 1 week ago (1 children)

Meanwhile, although this is going on there, China is massively funding every renewable tech possible to be built to turn over their reliance on fossil fuels as quickly as possible. Making the Earth better, gaining robust energy independence, and moving things on from the 20th century.

[–] Womble@piefed.world 8 points 6 days ago (1 children)
[–] Jiggle_Physics@quokk.au 2 points 6 days ago

Correct, but these are also built to be turned off as soon as their growing renewable grid can handle peak power in the most densely populated regions. They specifically use coal because that is abundant to China, and within it's plan for independence as well, and grants them a lot of security again foreign influences.

They are trying really hard to bring fission power into this, but their Houlong and Linlong plants are just to cumbersome to build quickly, and they are working on a network of smaller fast neutron, and thorium reactors, which they can sustain easily without foreign supply chains.