Space Debris in Darmstadt
It's a mess up there. Aside from pieces of satellites, rocket bodies fragments and other clutter currently tracked, many more orbiting objects are smaller than 10 cm and cannot be tracked.
What to do about all this space junk? There is no quick cleanup, but there are conferences. This week, the Fourth European Conference on Space Debris, takes place in Darmstadt, Germany, April 18 - 20. The gathering is organized by ESA, and a crew of co-sponsors, including ASI, BNSC, CNES, DLR, COSPAR, IAA.
And if you can't get to Darmstadt, check out ESA's Focus On Space Debris, Part 1 and Part 2.
And remember: Don't litter.