this post was submitted on 30 Jan 2025
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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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Carbon-Negative Food Production System Developed in Iceland via Cultivation of Microalgae Using Light from Geothermal Station (veganfta.com)
submitted 1 day ago by Sunshine to c/[email protected]
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[โ€“] [email protected] 8 points 1 day ago (1 children)

Pretty cool concept, but by those metrics, normal hydroponic cultivation of crops would be "carbon negative" as well if supplied from a similar power source. This is less about the algae, and more about the energy source for the artificial grow-lights etc...

[โ€“] [email protected] 2 points 3 hours ago

Most agriculture uses light from a green source: the sun... Although I suppose that's a scarce resource in Iceland through half of the year.