this post was submitted on 31 Jul 2025
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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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Researchers quietly planned a test to dim sunlight. They wanted to ‘avoid scaring’ the public. (www.politico.com)
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[–] phutatorius@lemmy.zip 4 points 1 day ago* (last edited 1 day ago) (1 children)

What is the relative contribution to global warming from reduced sulfur from marine engines, versus increased CO2 and greenhoue gas emissions worldwide?

Because, from this, it appears shipping is not the bigger contributor.

https://en.wikipedia.org/wiki/Environmental_impact_of_shipping

[–] MachineFab812@discuss.tchncs.de 3 points 1 day ago

Who said anything about "the bigger" contributer? No one is calling increased cloud-cover the solution - hell, I literally stated we need it to buy time, because spoiler alert: it will take decades if not centuries for the extra CO2 we've put into the atmosphere to filter back out. We could easilly reach net-zero or net-negative CO2 emissions only to all end up dead well before seeing any positive effects.

In case you need this spelled out also: No-one is suggesting we should put sulfer back into marine fuels.