this post was submitted on 31 Jul 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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As US bets big on hydrogen for clean energy, local communities worry about secrecy and public health (grist.org)
submitted 4 months ago by jeffw@lemmy.world to c/climate
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[–] kalkulat@lemmy.world 9 points 4 months ago (1 children)

Looks like a lousy bet.

"Hydrogen can be produced by several means. Most hydrogen produced today is gray hydrogen, made from natural gas through steam methane reforming (SMR). This process accounted for 1.8% of global greenhouse gas emissions in 2021. Low-carbon hydrogen, which is made using SMR with carbon capture and storage (blue hydrogen), or through electrolysis of water using renewable power (green hydrogen), accounted for less than 1% of production. "Virtually all of the 100 million tonnes[5] of hydrogen produced each year is used in oil refining (43% in 2021) and industry (57%)"

... Wikiipedia. https://en.wikipedia.org/wiki/Hydrogen_economy

[–] reddig33@lemmy.world 4 points 4 months ago

It’s just greenwashing for the fossil fuels industry.