this post was submitted on 31 Jul 2023
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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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America Needs To Install A Lot More Heat Pumps (www.distilled.earth)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
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I'll note that this post is paywalled, but the key facts are outside the paywall.

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[–] [email protected] 5 points 1 year ago

Yes, over 100% efficiency is exactly what I claimed. In winter, you'll get more BTUs of heat output from a heat pump than you had put in as BTUs of electricity input -- because instead of converting the electricity to heat, it's using the electricity to pull heat from the outside and put it in your house. Hence, it's a more energy-efficient way to do things than the laws of physics would allow for a device that directly converted electricity to heat. That's what it means to be a reversible air conditioner, yes.

IDK why me saying that is some kind of controversial statement -- it's simply a factual description of the product. There are scenarios and real-world constraints which may mean it's more or less sensible to install one, but over 100% efficiency is, exactly, the selling point of a heat pump.