this post was submitted on 03 Mar 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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Energy efficiency of active travel (walking, cycling, ebike) compared to an electric car (slrpnk.net)
submitted 9 months ago* (last edited 9 months ago) by [email protected] to c/[email protected]
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[–] Kbobabob 4 points 9 months ago (1 children)

What would the energy usage be if all of them were going the same speed?

[–] [email protected] 1 points 9 months ago* (last edited 9 months ago) (1 children)

More importantly, the KWH used to go the same distance. Sure a car uses more power... It's going faster, and gets to its destination faster, therefore using power for less time.

Energy is measured in KWH, people. But yeah, your point about normalizing to the same speed to make the comparison fair is good.

[–] Gabu 4 points 9 months ago* (last edited 9 months ago)

The graph is in Wh per Km, so it's already measuring the energy per same distance.