this post was submitted on 31 Oct 2025
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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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silence7@slrpnk.net
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Portland won’t weaken its policy to phase out petroleum diesel and replace it with biofuels (www.oregonlive.com)
submitted 5 days ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] silence7@slrpnk.net 4 points 4 days ago* (last edited 4 days ago) (1 children)

You can, but that will only substitute for a fairly small fraction of US transport needs

To put this in context, california has a similar biofuels content requirement, which uses about 40% of soybean oil in the US, while displacing a few percent of the state’s diesel use

[–] reddig33@lemmy.world 3 points 4 days ago* (last edited 4 days ago)

Added a /s.

Honestly it’s wasteful to grow crops for fuel because of all the water needed to grow it.