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by coolspot 3002 days ago
Low orbit junk quickly falls back onto earth if not supported by engines.
1 comments

"quickly" can still be several years, or more.
The industry standard is deorbit within 25 years after end of mission. The SpaceX proposal (1) plans for deorbiting of every satellite within one year after the end of their mission.

(1) http://licensing.fcc.gov/cgi-bin/ws.exe/prod/ib/forms/report...