LEO satellites come down on their own in a few months/years. 100 tons of metal burning in the atmosphere seems a lot, but it's barely the total mass of meteorites falling in 24-48 hours, actually.
Copper in particular is a well-known catalyst for the destruction of ozone.
Source: https://www.sciencedirect.com/science/article/pii/S027311772...
Aggravatingly, I have seen research estimating that even the much smaller number of satellites currently in orbit is already enough to be unstable with regard to a Kessler cascade, and any question about the realism of Musk's goals from finance and engineering limits is clearly not enough to prevent this kind of scenario. Which may result in other governments interfering with his ketamine supply to make sure their satellites aren't caught up in one.
Simplest helpful thing for the Kessler problem is "just"* have fewer larger satellites, and if Starship actually delivers the launch costs necessary to make space-based data centres worth the bother vs. just buying some cheap desert land, I anticipate Musk getting managed upwards by his staff in this regard.
* nothing in space is "just"
Regardless of how they fall, they still fall on the planet.
And this still ignores the massive atmospheric pollution of chemical rocket launch.
Space elevator would be a big help with launch, but the trash is still dropped on the ground, or in the ocean, in the end.
Leave it to the chainsaw man who has already become the millenium's worst killer, to wreak yet more sad havoc and ruin upon the sphere. What absolute trash, what a mad frivolous pointless ambition meant only to crowd out anyone from thinking of this enormous mass stupidity, destruction. Taking up/taking over of space, for no clear stated reason or value except to steal from us all, to deny & claim from the rest. Madness. https://www.thelancet.com/journals/langlo/article/PIIS2214-1...
It seems like an incredible amount of pollution to make, to go lord over everyone's heads. This isn't a plan that has any empathy for the earth or reason, except to just deny everyone else access, to burn as much rocket fuel as conceivably possible. So no one else can. Just go build some terrestrial solar, please, thanks.
The man is the bloodiest butcher of the millennium and this is a vile stealing of shared human space. Your lack of actually saying anything and throwing random jabs my way to defend him is ignoble & distracting, adds 0 engagement.