this post was submitted on 03 Jul 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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The hunt for the most efficient heat pump in the world (arstechnica.com)
submitted 5 months ago by [email protected] to c/[email protected]
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A new generation of engineers has realized they can push heat pumps to the limit.

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[โ€“] [email protected] 2 points 5 months ago (1 children)

I ended up figuring out how to do mine myself with a Mr Cool kit when the furnace died due to the fact that every hvac guy believed a 4th gen heat pump would be useless in the northeast us. It gets down to about 0F here once or twice a winter and the heat pump starts struggling to keep up around those temps but it still does its job.

[โ€“] [email protected] 2 points 5 months ago

Whoa, that's f* cold, but with your feedback I'm quite positive all this doomsday feedback I got can be ignored. Problem here is I'll be respnsible for uninterrupted heat and warm water for my tenants, too, so doing these calculations alone, for myself, would not bother me. But there's a ton of responsibility to care for the tenants, and I'd like a professional up for the challenge.