this post was submitted on 13 May 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:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

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[–] HaraldvonBlauzahn@feddit.org 4 points 1 day ago (1 children)

Seems same discussion as in Germany. The last government came up with legislation that would ban new gas heating installations. There was a fierce campaign against - but now, sales of gas heaters are dropping dramatically as owners of new homes, and replacement of old units are switching to heat pumps.

Bad politics has won for a moment, but people are voting out the old technology with their purse.

[–] silence7@slrpnk.net 1 points 1 day ago

Methane gas prices in the US have historically been far lower than in western Europe; US was historically export-constrained, so prices were quite low. Datacenters + more exports are about to change that.

[–] SaveTheTuaHawk@lemmy.ca 1 points 1 day ago

You will not be able to swap out a water heater for $3500.

[–] NotEasyBeingGreen@slrpnk.net 1 points 1 day ago

In principle one should save a lot of money with heat pumps. Surely one can get a low-interest loan for the amount by increasing one's mortgage, which should more than pay for itself?

[–] TheGoldenV@lemmy.world 9 points 3 days ago (2 children)

I’m calling BS on $3500 _extra and the lack of justification in the article reinforces my belief. Then when I tried to go back the site tried to retain me twice. Indications of a junk source.

[–] Cort@lemmy.world 2 points 1 day ago

If someone is going from gas to the highest end heat pump, I could see an extra 3500 being possible with higher cost for the heater itself as well as the extra labor to install a new electrical outlet.

But that's a worst case scenario. There are a few newer heat pumps that can use a standard 120v/15a outlet, and that would be much cheaper

[–] silence7@slrpnk.net 9 points 2 days ago

It's the main newspaper in San Jose, so probably about as reliable a source of news as you're going to get. The author is their senior environmental reporter too.

[–] reddig33@lemmy.world 7 points 3 days ago* (last edited 3 days ago) (2 children)

Does San Francisco/California not have heat pump rebates on water heaters? Did the feds get rid of their rebate?

My heat pump water heater cost me next to nothing because I was able to stack rebates in my state.

[–] silence7@slrpnk.net 7 points 2 days ago

I think it varies by muncipality. Which makes it tough.

[–] LibertyLizard@slrpnk.net 5 points 3 days ago

We have them in Sacramento but it's a local subsidy. Can't speak to the Bay Area.