this post was submitted on 06 Mar 2026
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Climate

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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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40% of global ship traffic is simply moving fossil fuels around! Renewables make much of this traffic obsolete (slrpnk.net)
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[–] catdog@lemmy.ml 6 points 9 hours ago (3 children)

Some ships would carry ammonia, hydrogen, etc.

Still better than the status quo.

[–] MisterD@lemmy.ca 1 points 1 minute ago

Hydrogen is coal with extra steps. It takes a lot of energy to make hydrogen

[–] mojofrododojo@lemmy.world 2 points 4 hours ago* (last edited 4 hours ago)

Some ships would carry ammonia, hydrogen, etc.

there's already a movement to change over to ammonia for fueling shipping. I don't have a good feel for the benefits and drawbacks but it is out there.

https://news.mit.edu/2025/unlocking-ammonia-fuel-source-heavy-industry-amogy-1125

[–] UPGRAYEDD@lemmy.world -1 points 7 hours ago

Also, those ships themselves cant run on batteries. So some fossil or liquid fuels would still be needed in some applications.