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 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
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[–] [email protected] 20 points 1 year ago* (last edited 1 year ago)

This would be much more efficient if it had other transportation as well.

Like non-electric cars, trains, subways, etc.

It's not too hard to get their efficiency as well.

NEXT DAY EDIT: Should've looked, there's actually a handy chart showing the energy efficiencies of a whole bunch of vehicles and modes of transport just straight up on Wikipedia. This article. Comparing the km/MJ column, we can see:

Walking 4.55

Velomobile with enclosed recumbent: 12.35 (there wasnt a figure for just regular biking)

Solar car: 14.93

Tesla Model 3: 1.76

General Motors EV1: 1.21

All combustion engines are below 1, but here's a few:

VW Passat: 0.33 Cadillac CTS-V: 0.17 Renault Clio: 0.42

There's a whole bunch of other stats though so I suggest checking the table

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