But where will that extra downward traffic come from? The total weight of all space debris is only around 6000 tons[0] so that'll get exhausted within a matter

But where will that extra downward traffic come from? The total weight of all space debris is only around 6000 tons[0] so that'll get exhausted within a matter of years (assuming we're even capable of collecting said debris). The only other alternative seems to be pulling near-Earth asteroids into geosynchronous orbit and using that. [0] http://www.dnaindia.com/analysis/comment-space-debris-constant-threat-to-life-on-earth-1632965 http://www.dnaindia.com/analysis/comment-space-debris-consta...