this post was submitted on 28 May 2024
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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 call to replace air conditioners with heat pumps in California (www.canarymedia.com)
submitted 5 months ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] AI_toothbrush@lemmy.zip 25 points 5 months ago (3 children)

Wait arent air conditioners heat pumps???

[–] silence7@slrpnk.net 14 points 5 months ago

Because it costs about $5 more to put in a valve which lets them work both ways, and people don't really know that this is a possibility, so they don't ask for it.

[–] where_am_i@sh.itjust.works 8 points 5 months ago

Most modern ones are. But the old models don't have a reverse cycle built into them. Also, for efficient heating in low temperatures you might want a different gas. Maybe not as relevant in California, but normally you wouldn't be able to use your AC as a heat pump in below 0 celcius.

[–] Maalus@lemmy.world -4 points 5 months ago

Nah. They are one direction only. The heating part is literally just an electric furnace in an air conditioner. Heat pumps have them too, but they reverse where is the hot side and where the cold side is. An air conditioner is always hot side outside, cool inside.