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 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]
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[โ€“] [email protected] 4 points 8 months ago (1 children)

It is interesting, but remember we need food to live anyway, and we need exercise to stay healthy. If we ask used ebikes on max pedal assist to get around, but then go to the gym and pound the treadmill for an hour, what does that do to the numbers? Or if we eat less and burn less energy, but then lose bone density and need more healthcare as we age (just one effect among many of not getting enough exercise)?

[โ€“] [email protected] 1 points 8 months ago

Oh for sure, yeah. I have a sedentary office job, so the e-bike commute is my primary source of exercise (particularly after I quit the gym during the pandemic), so I tend to keep the pedal assist low and try to get a workout. There are exceptions though. Sometimes I'm just tired or sore, or it's really hot with bad air outside, and I elect to go all electric on days like that. It's nice to have the option!