Blocking out the sun with aerosols is a good idea if you know with high confidence how it will impact the climate system and environment. That's why they're trying to simulate it with the supercomputer, so they know if it fucks stuff up or not.

I don't even believe this is a serious article, it sounds like a Simpson's episode plot. Let's ask sunglasses manufacturers to protest so that we prevent this plan (I'm Matt Groening)

Industry gives off greenhouse gasses that cause more sunlight to be trapped. It also gives off aerosols that reflect the light before it gets there, but those are in lesser amounts. This proposal is to release more of those aerosols into the atmosphere to counteract the effects of global warming. "Blocking out the sun" is just a clickbait headline. Read the article.

You got a better idea? Earth is cooking, convincing everybody to stop burning fossil fuel is not working, and we're out of time.