this post was submitted on 30 Oct 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.

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

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The key role of sufficiency for low demand-based carbon neutrality and energy security across Europe (www.nature.com)
submitted 2 months ago by silence7 to c/climate
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[โ€“] iii@mander.xyz 1 points 2 months ago* (last edited 2 months ago)

The modelling approach involves several steps, beginning with the development of bottom-up national trajectories, followed by a comparison of the ambition levels of the national trajectories (...). Using data from the literature, target level corridors for key indicators such as heated living space per capita or passenger-kilometres per capita were defined, with a minimum floor, among others, shaped by decent living standards 9,10 and the maximum on 1.5โ€‰

It's a different usage of the phrase "bottom up approach" than I'm used to.

From the title I expected: grassroots initiatives that are expected to convince a sufficiently large amount of people, and have a large impact on carbon neutrality.

What the article seems to describe instead is a (1) top down, sim city like, approach to life. Where the authors assign an allowance to each sim (2) And then sum the individual allowances.

Part (2) is indeed, a bottom up approach. Just not the one I expected.