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 4 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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[–] [email protected] 1 points 4 months ago* (last edited 4 months ago)

"Heat pump" is just the latest buzz word. If you look up how they work its literally just a regular air conditioner with a switch to reverse the air flow.

Compressing refrigerant, allowing it to absorb thermal energy from inside the house, pumping that refrigerant to an outside coil where it releases that energy, then compressing again. This is air conditioning.

Not saying it's not useful or whatever. But it's not some incredible new technology. You could accomplish the same functionality by installing your window unit backwards.