this post was submitted on 30 Apr 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.

Recommended actions to cut greenhouse gas emissions in the near future:

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Water Heaters Use Lots of Energy. The D.O.E. Wants to Change That. The Biden administration is tightening efficiency rules for water heaters, stoves and other appliances (www.nytimes.com)
submitted 6 months ago* (last edited 6 months ago) by silence7@slrpnk.net to c/climate@slrpnk.net
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Washington Post coverage for comparison

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[–] ramble81@lemm.ee 2 points 6 months ago (2 children)

Hmm, I couldn’t find anything about tankless heaters. I absolutely love that I never run out of hot water, especially after my wife takes her shower.

[–] silence7@slrpnk.net 7 points 6 months ago (1 children)

Per the actual rule:

As discussed in section II.B.3, DOE is finalizing standards for all consumer water heaters, with the exception of gas-fired instantaneous water heaters, in this Final Rule.

So there has been no change to the rules for tankless heaters.

[–] admiralteal@kbin.social 3 points 6 months ago (1 children)

Believe It or not there are electrical tankless heaters. I actually installed one not too long ago because it made sense in a very odd application.

Mostly they're a terrible idea though.

[–] silence7@slrpnk.net 4 points 6 months ago

Yeah, they're pretty rare and almost never the best option. I don't think I've actually encountered one.

[–] fubarx@lemmy.ml 2 points 6 months ago

We switched to an externally mounted tankless when our big ole water heater conked out. It's way more energy efficient, but everyone has to run the water for a good minute until it kicks in and makes it through the pipes

I'll look into a heat pump once this one dies, but running water during a drought is just wrong.