Biggest garbage dump: Oceans or Space?

People are good at spreading trash around the globe, and even our vast oceans are starting to fill up with (mostly plastic) refuse. Witness the North Pacific subtropical gyre, a floating trashcan the size of Texas. But outer space is closing the gap, according to a recent article in the German newspaper Frankfurter Allgemeine Zeitung (thanks, TreeHugger). We've heard a lot about the threat space debris poses to expensive communications satellites (read: Pentagon is getting worried about damaging their pretty spy sats), but what about crewed flights? Tourists' flights into low Earth orbit are going to be bumpy rides if we don't get to fixing his problem soon.