You might think a geo-synchronous orbit is safe' date=' huh? Well, I think that all the stuff that's flying around randomly will probably collide with a geo-synchronous object, and add to the other junk, probably at a migher, "geo-synchrous" level. The things have to be at a propergeo-synchronous orbit, in sync with all the other objects. Anything less will create a hazard.[/quote']
geo-synchronous orbit is 22,236 miles up.
Anything above that will have an increasing orbit.
Anything below that will have a decreasing orbit and will at some point. re-enter the earths atmosphere.