You're thinking of Kessler syndrome: https://en.m.wikipedia.org/wiki/Kessler_syndrome https://en.m.wikipedia.org/wiki/Kessler_syndrome No, we haven't been told

You're thinking of Kessler syndrome: https://en.m.wikipedia.org/wiki/Kessler_syndrome https://en.m.wikipedia.org/wiki/Kessler_syndrome No, we haven't been told it's inevitable, as it is highly evitable with tracking and controlled descent. Eventually we'll be able to shoot down space junk with frickin laser beams ("ablate" it) and it will be a complete nonissue.