this post was submitted on 16 Oct 2023
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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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SUVs emit more climate damaging gas than older cars do, study finds (www.theguardian.com)
submitted 1 year ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] silence7@slrpnk.net 3 points 1 year ago (1 children)

"doesn't have to be" but in practice they in fact are. I wouldn't call this a bias problem; it's that people are making and selling and buying huge and inefficient vehicles.

[–] Miclux@lemmings.world 1 points 1 year ago (1 children)

Inefficient? A modern car no matter what size is always more efficient than a small car from the 90s. Just look at the euro emission standards.

[–] silence7@slrpnk.net 1 points 1 year ago* (last edited 1 year ago)

A 1985 Honda Civic got 34mpg. A modern Ford F150 gets between 14 and 25

The newer engines are a lot more efficient, but in the US (and a lot of other places) that increased efficiency has been used to move a bigger heavier vehicle, rather than to cut overall fuel use.