this post was submitted on 25 Mar 2025
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Climate - truthful information about climate, related activism and politics.

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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:

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Solving cement’s climate problem | Concrete is the second-most consumed substance on Earth. The process of making its key ingredient, cement, creates major pollution. (yaleclimateconnections.org)
submitted 3 weeks ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] Paragone@slrpnk.net 5 points 3 weeks ago (1 children)

A decade or more ago, on the Low Tech website ( which I still find ironic ), I pointed-out that a solar-concentrator is THE ideal method for roasting the ingredients of cement, instead of using conventional/fossil energy.

Use solar-concentrator for the roasting, you can reach any temperature you want, I think the way to make solar-concentrators not kill birds ( flash-incineration ) is with either sound they don't like, or with making a dome over the entire site, & just putting a sparse "spiderweb" of fiberglass strands over it, so as to keep them away.

So long as the concentrator is still able to work, it'd be good-enough, & it would detach cement-manufacturing from the conventional energy-sources, for the heat.

( moving the materials would still cost electricity, but that's minor, compared with the roasting )

[–] houseofleft@slrpnk.net 3 points 3 weeks ago

That sounds awesome! Do you have a link to the article you wrote?