this post was submitted on 10 Sep 2023
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Climate - truthful information about climate, related activism and politics.

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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.

Recommended actions to cut greenhouse gas emissions in the near future:

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[–] noqturn@lemm.ee 12 points 1 year ago (16 children)

I now wonder what impact cycling has. Obviously, the tires are much smaller and supporting far less weight, but I’m sure I’m still spewing rubber when I brake.

[–] kozy138@lemm.ee 32 points 1 year ago (12 children)

How often do you change tires on your bike vs your car? 200lbs vs 2000lbs to stop is a pretty significant amount.

[–] noqturn@lemm.ee 2 points 1 year ago

Yea this is a good point. I’ve had my road bike for four years and haven’t changed the tires yet, but I’ve had to replace my tires two or three times on my car (long work commute on sketchy mountain roads, and a pair of flats).

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