this post was submitted on 12 Mar 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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Where Heat Pumps Win — And Where They Lose | Five findings from an extremely thorough study by the US National Renewable Energy Lab. (heatmap.news)
submitted 7 months ago by [email protected] to c/[email protected]
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[–] taiyang 9 points 7 months ago

I just got a 600 and 2000 credit on a heat pump I bought last year. Funny story, too, because most variable units don't technically qualify. The unit I picked did, but the HVAC people had it on back order and talked me out of it for a slightly older, slightly better variable unit. After a heated back and forth, I talked them into giving me an additional 2000 since (we thought) I wouldn't qualify for the tax credit and I was gonna wait. Fast forward to today, turns out I did qualify and I managed to bumble my way into a discount and a credit.

By the way, if you live in CA, you can see a distribution of what people paid because the Cali credit requires transparency. It's even got a list of the dealers, since they have to give that into when applying for the credit.

Last piece of advice, buy during an off season. HVAC is most in demand in the heat of summer, so doing it in the fall when it won't be useful gives you leverage. The baseline for the 2.5 ton unit was $16k (with non variable 2 tons at $10k) and I got them down to $12k before tax credits and rebates, and that included removing my old gas heater, capping the line, installing vents, revamping my attic, and installing a new sub panel.