We've been accidentally geoengineering for decades...but then we stopped:
We've been accidentally geoengineering for decades...but then we stopped:
SO2 actually (very temporarily) cools things down by seeding clouds and creating sulfuric acid aerosols. That's not, like, /good/, but by making more clouds (and also decreasing the size of droplets in clouds, and thus increasing their number) more sunlight is reflected to space.
Ref: https://twitter.com/hankgreen/status/1687535533831102464
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It's a similar story in cities. The haze or smog from cars and buildings shields cities from some of the heat coming from the sun.
As we electrify vehicles and buildings, cities might get warmer.
(Obviously we should still do it, but it is what it is)