this post was submitted on 28 Mar 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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[–] HaraldvonBlauzahn@feddit.org 1 points 37 minutes ago* (last edited 37 minutes ago)

“You never change anything by fighting it; you change things by making them obsolete through superior technology. ..." (Buckminster Fuller)

[–] stumu415@lemmy.zip 6 points 19 hours ago* (last edited 19 hours ago)

China is winning the race whilst the US is going back to beautiful coal and stolen oil.

https://hive.blog/hive-167922/@cryptoandcoffee/china-invested-1-trillion-on-renewable-energy-last-year-dqc

[–] RememberTheApollo_@lemmy.world 8 points 1 day ago (1 children)
[–] HaraldvonBlauzahn@feddit.org 1 points 31 minutes ago

You can support it by using electricity, for water heating, laundry, dishwasher, when there is a surplus of solar power. Don't give money to power companies that kill us, give it to producers of clean, safe, and peaceful energy.

[–] eleitl@lemmy.zip 1 points 1 day ago (2 children)
[–] Dippy@beehaw.org 4 points 1 day ago (1 children)

The race is about new energy. An old gas plant is still cheap to operate. But when faced with the decision of building new capacity, solar is cheaper and its not close. New gas energy is grinding to a halt.

[–] Greyghoster@aussie.zone 2 points 21 hours ago (1 children)

Old plants aren’t cheap enough to operate. The cost of gas and coal is expensive and ongoing. The plants are old and need increasing maintenance and costs are rising. Unless they can charge a premium they are money pits. Solar beats them hands down as once the capex is paid then the opex is trivial by comparison. It’s the preferred financial model.

[–] HaraldvonBlauzahn@feddit.org 1 points 28 minutes ago* (last edited 27 minutes ago)

And as oil reserves are shrinking, extraction becomes ever more expensive. This will turn into a negative feedback loop.

At some point, fossil power will not generate any more enough money to sustain itself. It could collapse just like Stalinism in 1989.

[–] phneutral@feddit.org 5 points 1 day ago (1 children)

Electric motors and heat pumps are far more energy efficient than their combustion counterparts. Solar and wind electricity can be generated in situ or transported via cable. No need to power ships and trucks for fossil delivery to refineries or fuel stations. Thus we will end up with less primary energy.

[–] eleitl@lemmy.zip -1 points 1 day ago (3 children)

How does a heat pump helps you firing Portland cement, ceramics, melting glass and metal, fixating air nitrogen? And these are all 24/7 industrial processes.

[–] HaraldvonBlauzahn@feddit.org 2 points 23 minutes ago

These are still big challenges, but very bright people already work on them. For example, Germany's Hans-Joachim Schellnhuber, a top climate scientist, is working on climate-friendly buildings. Other research groups have worked on recycling concrete into more climate-friendly cement as a co-product of electrical steel processes.

[–] Greyghoster@aussie.zone 5 points 21 hours ago (1 children)

As you say, these are industrial processes and need to be addressed by industrial solutions. There are new processes for steel, cement and fertiliser being developed and tested. They will move to mainstream as we electrify everything.

[–] eleitl@lemmy.zip 1 points 5 hours ago

Looking at glass, or cement. Do you know a heat pump that runs at up to 1600 C? So it's just plain ohmic heating. And it's a 24/7 process, so it needs electrochemical backup. Do you know what that does to your EROEI?

[–] liuther9@lemmy.world 2 points 1 day ago

In cement production particularly: Pumps + co 2 capture = 5x efficiency in the process + negative carbon footprint

Add renewables and voila, best cement factory in the world