This article seems to put the blame on the shockwave from Starship’s rapid unscheduled disassembly in the upper atmosphere (not its launch) but there’s also been recent warnings about the effects of metal particulates from such explosions, satellites burning in the atmosphere, and similar pollution on the ionosphere.
All in all, burning or blowing up metallic crap in the upper atmosphere seems to be quite a bad idea.
This article seems to put the blame on the shockwave from Starship’s rapid unscheduled disassembly in the upper atmosphere (not its launch) but there’s also been recent warnings about the effects of metal particulates from such explosions, satellites burning in the atmosphere, and similar pollution on the ionosphere.
All in all, burning or blowing up metallic crap in the upper atmosphere seems to be quite a bad idea.