this post was submitted on 22 Dec 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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‘If 1.5m Germans have them there must be something in it’: how balcony solar is taking off (www.theguardian.com)
submitted 19 hours ago by ByteOnBikes@slrpnk.net to c/climate@slrpnk.net
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Crosspost from https://beehaw.org/post/17685168

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[–] Anivia@feddit.org 3 points 3 hours ago (1 children)

Maybe just look at how these inverters work before babbling about. These kits all come with standard off the shelf micro inverters, or rarely bigger string inverters, and will feed back up to 0,8wk into the grid if the energy is not used in the household. If the connection to the grid is lost they turn off within less than 50ms, making them completely safe for line technicians

[–] barsoap@lemm.ee 2 points 1 hour ago* (last edited 1 hour ago)

and will feed back up to 0,8wk into the grid if the energy is not used in the household.

Even more precisely: If the energy isn't used on the exact phase the inverter is connected to. You might be simultaneously backfeeding 800W on one phase and draw 3000W from the grid for your kettle on another, pretty much every single installation (at least in Germany) is three-phase at the main breaker panel, then distributing (and three-phase for the stove). Good ole Ferraris meters only record the total sum (the wheel would turn at the speed of 2200W) but you're still using grid infrastructure which is one of the reasons why the installations have to be small: Because your utility can't bill you for grid usage.