How does hazardous waste get cleaned up from space?

Have you ever heard of the iPod game Space Monkey? There's a bunch of trash floating around in space and endangering live planets and it's all over Saturn's rings. You're allowed to collect the trash which is non hazardous such as a basketball or a pacifier but you can't pick up the batteries because they'll shock you and your monkey will get hurt. If this happened in real life, how would it be cleaned up? Knowing that the game is hard enough to pass through, I am certainly curious. I wonder how it got there in the first place too.