Rather alarming article from Scitechdaily on the new risks to our ozone layer - It’s estimated that by the time the currently planned satellite constellations are complete, every year, 912 metric tons of aluminum (1,005 U.S. tons) will fall to Earth. That will release around 360 metric tons (397 U.S. tons) of aluminum oxides per year to the atmosphere, an increase of 646% over natural levels. https://scitechdaily.com/ticking-time-bomb-space-junk-is-eating-away-at-earths-ozone-layer/