Space debris junking up Earth orbit is actually an increasing problem. At last, though, some UK researchers have come up with tiny garbage hauler satellites to clear it all up! Useful and adorable!
I myself have toyed with the idea of some sort of big Swiffer or spiderweb attached to a satellite that could catch and hold space junk and clear it away. I'm not a space research center, though, so I'm glad someone else with the wherewithal to do it was thinking along the same lines.