this post was submitted on 06 May 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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[–] zerakith@lemmy.ml 3 points 6 months ago

I think we would do a disservice if we only talk about this being a North American phenomenon. It is true that North America sets itself apart for the scale of the chasm but quite a lot of Europe suffers from the same problem albeit on a reduced scale. Car culture having reshaped non-city (and city) urban landscapes combined with an international and local capital class that has horded city property as a form of profiteering is sadly a story you could apply to a large swathe of cities across the planet. I do also think that those wealthy people who do fantasize about "the countryside" sadly are winning near me in the sense of moving out and demanding and lobbying for modern infrastructure.

I think, this does demonstrate a key issue with unpicking impacts on climate: accounting for how humans will adjust their behaviour in reaction to a new policy or technology (see also e.g. Jevon's Paradox). This is absolutely vital research that needs to occur but rarely does. The climate doesn't actually care about why the policy made worse impacts only that there is more CO2 in the atmosphere than there would otherwise be. I do agree with you: our job is to interpret the facts and try and assess the different situations we can have as much as as we can at the system wide level and compare those to where we need to be. That will likely involve sorting out building and housing as well as measures to decrease the total amount of travel as well.