this post was submitted on 13 Jul 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:

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Tropical nights come to Europe | The biggest rise in extreme temperatures is not in the daytime (www.ft.com)
submitted 6 days ago* (last edited 6 days ago) by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] ComradePenguin@lemmy.ml 2 points 6 days ago (1 children)

Haven't Germans embraced air-to-air heatpumps? They work great as ACs

[–] Multiplexer@discuss.tchncs.de 4 points 6 days ago* (last edited 6 days ago) (1 children)

Haven’t Germans embraced air-to-air heatpumps?

No, heatpumps up to now have been primarily used to heat buildings and thus are almost exclusively of a air-water type.
Reason for this is also the subsidies that are apparently mainly available for this type.

Also classical heating systems still dominate, partly because most people in Germany live in rented appartments. As the cost of heating has to be paid by the tenant, landlords have no real incentives to convert their buildings to more up-to-date systems, which only the tenant would financially benefit from.

So what you see when walking through the streets are the air-outlet-hoses of crappy mobile monobloc cooling devices hanging out of the windows... (I own one myself).

[–] ComradePenguin@lemmy.ml 3 points 6 days ago (1 children)

Ah, that makes sense.

Btw: RV/Camping stores often sell ACs with two hoses. This prevents underpressure pulling hot air in again

[–] Multiplexer@discuss.tchncs.de 3 points 6 days ago* (last edited 6 days ago)

ACs with two hoses

I searched for those, but haven't seen any available anywhere here in Germany any more, seem to have vanished from the market.
I heard that is an unintended side-effect of EU regulation regarding efficiency.
The two-hose-variants on paper have a lower efficiency, as for the efficiency calculation the pulled in hot outside air is not considered.
So the manufacturers just don't bother selling them anymore here...