There are several angles to managing global warming, and directly targeting managing the composition of the atmosphere looks like a good approach.<p>Especially given that this is how we caused the problem in the first place, but personally I favor also tackling managing climate via controlling incident solar radiation by using fleets of thin-film mirror satellites that can vary their orientation to the earth. This way they could change the size of their cast shadows and also the target of their reflection.<p>Assuming the ability to modulate a few percent of the incoming solar radiation we should be able to have a significant control on one of the main forces driving climate.<p>With modeling and experimentation I expect that by using this (coupled with CO2 reduction and significant engineering to mitigate glacier erosion) we could end up avoiding a lot of the ravages of runaway climate change.
So, this is what Musk talked about when he spoke about giving $100M for carbon removal. It's clever. With a bit of luck a multiple of this amount will be invested by other people while participating in the race to win the price.<p>Edit: it looks like I was out of the loop. He tweeted that himself when announcing the amount: <a href="https://twitter.com/elonmusk/status/1352392678177034242" rel="nofollow">https://twitter.com/elonmusk/status/1352392678177034242</a>