this post was submitted on 28 Nov 2024
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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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[–] [email protected] 13 points 3 weeks ago (1 children)

After reaching 50% share in July, it is up to over 53% in October. https://english.www.gov.cn/archive/statistics/202411/21/content_WS673f370ec6d0868f4e8ed4b2.html

EVs make better cars. Faster and quieter, cheaper operation costs, and profit/emergency potential from V2G (or just to home), and future robotaxi. Charging infrastructure expands with success/penetration. Even in US and Europe, EV models that are cheaper than their ICE equivalents before rebates are already announced/on the market.

IEA projections are always behind. Natural gas use in Europe and China is also down. and will continue its pace.

[–] [email protected] 7 points 3 weeks ago (4 children)

EVs are heavier, put more wear on the roads (for the same class of vehicle) and more microplastics into the environment from the tires. They don’t fix noise pollution, road safety or congestion.

We need better public transit, not robotaxis.

[–] [email protected] 21 points 3 weeks ago

Fuck good, let’s have perfect.

[–] [email protected] 8 points 3 weeks ago

They may not fix noise pollution, but they seem to reduce it. At least at urban speeds where I can be near them when they're driving, them sure seem to be significantly quieter than gas cars.

[–] [email protected] 3 points 3 weeks ago (1 children)

Also electric vs gas has nothing to do with robotaxis.

[–] [email protected] 2 points 3 weeks ago (1 children)

robotaxis need a lot of electronics/computing and so a large battery. A hybrid can charge that battery, but it is close to 50c/kwh electricity cost. V2G is a more obvious near term game changer. Can pay for cost of car over lifetime, or at least provide negative fuel costs. At any rate, an EV robotaxi will outcompete an ICE one. It also has the advantage of driving to a charging station during any downtime.

[–] [email protected] 1 points 3 weeks ago

That's a fair point, the integrated battery does make managing the equipment easier.

[–] [email protected] 1 points 3 weeks ago (1 children)

Wait, why are EV tires more polluting than gasoline tires?

[–] [email protected] 6 points 3 weeks ago* (last edited 3 weeks ago)

Because the car is heavier overall, which means they put more wear on the tires per mile driven.