We've heard about the disgusting and deadly Gyres. Massive whirlpools of trash, mainly plastics, generated by humans but swirling around in the middle of the world's oceans. They're out of sight to most people but should not be out of mind.
The Dish blog found a list of what's out there and why it's bad. Aluminum foil, balloons, batteries, bottle caps, and condoms top the list. See the whole list here.