this post was submitted on 06 Sep 2025
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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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Arizona’s Heat Is So Extreme Even Rattlesnakes and Cacti Are Struggling | You have to wonder, if these creatures built to survive this can no longer survive, what’s going to happen to us? (www.vice.com)
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[–] InvalidName2@lemmy.zip 25 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

"It’s so hot that even the famous cacti of the Sonoran Desert, such as the saguaro cactus —the Trident-like one you’ve seen in countless cartoons and cowboy movies —are struggling in the heat. They photosynthesize at night, when it gets a little cooler. But climate change

Has extended the times in which it is hot as hell not only further into the calendar year but further into the night. The saguaro cactus is struggling to photosynthesize when it’s still over 100 degrees, even after the sun has set."

Cacti, and plants in general, do not and cannot photosynthesize to any appreciable degree at night. Even the brightest, fullest moon and clearest sky full of stars is not enough light for this process to be effective/efficient. They do their carbon capture / gas exchange primarily at night, but that's a separate process and is not the same thing as photosynthesis.

But also, this whole section is just poorly formatted, unedited, incorrect, and badly written. Like even the tone seems to change in these "2" paragraphs. Why even include this in the article? It really undermines the rest of the content, in my opinion.

[–] ryannathans@aussie.zone 9 points 3 weeks ago

Vice has really gone down the shitter