this post was submitted on 14 Jul 2025
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Idk anything about stars or solar systems, but when my house gets too hot I just close the curtains and it helps everything cool down. Maybe we can close earth's curtains and will fix it?
This does happen and it’s an effective way to decrease the temperature:
Might be difficult to implement at scale though.
It's not really hard to implement at all but would just trade pest for cholera. We could just burn a lot of coal again, the dustier and dirtier the better. But that's pretty bad for air quality but it would seriously cool the planet.
Wouldn't filling the air with dark and absorbing gasses warm the planet?
Aerosols aren't gases in the classial sense and reflect sunlight. This works especially well high up in the atmosphere.
https://science.nasa.gov/science-research/earth-science/climate-science/aerosols-small-particles-with-big-climate-effects/
There are studies that collect data around volcano eruptions and coal power plants getting online and offline. Long story short: Climate is complicated; I'm not a climate scientist and not to be trusted; it would work great at cooling the planet; we definitely shouldn't do it (yet?) because it masks the temperature problem and could lead to us not reducing CO2 because we "wouldn't have to", but it could be a tool if we might be on the edge of a catastrophic runaway effect that causes too much water to evaporate into the atmosphere.
Update: Btw, you are right about dark particles low in the atmosphere, those typically warm the planet. It's mainly sulfur dioxide aerosols byproduct that cool the planet (also mentioned in the NASA article)