this post was submitted on 14 Oct 2023
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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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Refrigeration chemicals are a nightmare for the climate. Experts say alternatives must spread fast (apnews.com)
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[–] evranch@lemmy.ca 4 points 1 year ago

Note how often the refrigerant oil doesn't get out, only the gas. It's much harder to seal high pressure gases than low pressure viscous liquids.

Also much of the refrigerant in those consumer cans is R290 - aka purified propane. No ozone damage or global warming potential. People should actually be encouraged to use those cans instead of "real" refrigerants. I only recharge vehicles with R290 now as it's bound to escape again so it had might as well be a cheap and harmless gas.

I feel like all halogenated refrigerants should have been replaced by 290/600a at this point. Hydrocarbons are better in many ways and also dirt cheap.