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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[–] Nyssa@slrpnk.net -5 points 1 year ago (1 children)

Yeah, but bikes and buses still use tires. I was just wondering how the tires we will need to use in the future can be manufactured to reduce the pollution problem

[–] Koppensneller@lemmy.world 12 points 1 year ago (1 children)

To think that the pollution from tire wear on bikes and buses is even in the same magnitude as that on cars is deluding yourself.

[–] Nyssa@slrpnk.net 2 points 1 year ago (2 children)

Im not saying they're apples to apples, I'm saying that I was just wondering if we could design tires that were less conducive to creating microparticles

[–] Wogi@lemmy.world 4 points 1 year ago

No.

It doesn't matter what they're made of, either the street or the tire is going to break down due to friction. One of two things is being washed down the drain. And you don't want it to be the road.

You could design both road and wheel to be steel, those would break down the least, but steel wheels need tracks and then you're back to street cars. Which are great, by the way.

For a less disruptive solution, no current material matches the qualities of vulcanized rubber that we want for tires. The rubber we use on tires is relatively slow to break down, can hold pressure, makes good contact with rough surfaces, and is cheap.

If you can design a material that's better for the environment that does all of that, you'll be a billionaire within a year.

That’s why trams and trains are useful. Metal wheels. Upfront costs are higher but ongoing maintenance costs are much lower.