this post was submitted on 10 Sep 2023
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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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Tire wear and tear revealed as a major contributor to waterway pollution (newatlas.com)
submitted 1 year ago by Peaces@infosec.pub to c/climate@slrpnk.net
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https://pubs.acs.org/doi/10.1021/acs.est.3c03949

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[–] noqturn@lemm.ee 4 points 1 year ago (1 children)

I haven’t changed them on my road or mountain bike yet, and I’ve had them for 4 and 6 years respectively

[–] WalrusDragonOnABike@kbin.social 2 points 1 year ago

Then your brakes probably don't matter. As other pointed out, wear follows a quartic law, so 1/10th the weight per axle means roughly 1/10000th the waste. Not exactly sure how things like ground contact area per axle or or tire pressure affect it.