this post was submitted on 30 Dec 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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[โ€“] Hildegarde@lemmy.world 72 points 2 years ago (19 children)

Electrifying the trucks will not solve the problem. Batteries don't have the energy density to work for long haul trucks.

Zero emissions long haul freight is a solved problem. Electrified rail. It just needs to be built.

Governments are continuing to subsidize trucks instead of building the solution that already exists.

I'm curious what you think the energy density needs to be for it to be viable and why? The way I see it energy density is a very minor factor for this equation but I'm curious to hear your explanation.

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