this post was submitted on 07 Jun 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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Biden Administration Tightens Mileage Standards to Buoy E.V.s | The new rule requires automakers to achieve an average of 65 miles per gallon across all models by 2031. (www.nytimes.com)
submitted 5 months ago by silence7 to c/climate
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The new standards require American automakers to increase fuel economy so that, across their product lines, their passenger vehicles would average 65 miles per gallon by 2031, up from 48.7 miles today. The average mileage for light trucks, including pickup trucks and sport utility vehicles, would have to reach 45 miles per gallon, up from 35.1 miles per gallon. Selling electric vehicles and hybrids would help bring up the average mileage per gallon across their product lines.

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[–] SuperSpruce@lemmy.zip 1 points 5 months ago* (last edited 5 months ago) (1 children)

The fees should be floor(2*(vehicle weight in thousands of pounds)^3).

That would encourage lighter weight vehicles and be powertrain agonistic.

EDIT: I made an oopsie, meant thousands of pounds rather than pounds.

[–] Sconrad122@lemmy.world 2 points 5 months ago (2 children)

Am I doing the math right on this? Assuming your unit of fee is pennies: a 2600 lb bmw i3 (one of the smallest evs on the US market) would cost $351.5 million dollars to register. Even my 40 lb bike, if it was charged, would cost $1280. I'm all about car ownership being more expensive, but this seems...extreme

[–] SuperSpruce@lemmy.zip 2 points 5 months ago

Oops, I did the math wrong. I meant in thousands of pounds.

[–] spidermanchild@sh.itjust.works 1 points 5 months ago (1 children)

Why would you assume the fee unit is pennies? I assume you'd scale all of these values proportionally to the revenue needs. I think the road damage formula was to the fourth power of weight, not third though.

[–] Sconrad122@lemmy.world 2 points 5 months ago

Because it was the smallest unit of currency and the comment said the fees "should be" not "should be scaled by" or something to that effect. I first assumed it was dollars, but used pennies when it was obviously going to be too large. Idk, I guess that is where I went wrong, but it seemed like a reasonable assumption to make at the time that the formula was expressed in some denomination of currency