this post was submitted on 25 Jul 2023
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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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Are trains and railroad solarpunkable? (self.climate)
submitted 1 year ago by francisco to c/climate
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A lot of people point to trains efficiency as a way forward to minimize the environmental impact of the transportation sector. But are trains and railroad solarpunkable? Or is it just another "all eggs in the same basket" industry?

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[–] poVoq 3 points 1 year ago

The high prices are mainly a result of the push for high-speed trains that are exponentially more expensive to built and operate than regular speed trains. And to make things worse... the push for high-speed trains has resulted in the decommissioning of a lot of regional regular speed lines, meaning that now often you have to make a detour with a high-speed train to reach the same destination, and thus you are not actually faster at all.