There are five major gyres in our Earth’s oceans. A gyre is a very large area dominated by a slow moving vortex like current. There is a gyre in the North Atlantic, South Atlantic, North Pacific, South Pacific, and Indian Ocean. Plastic floats, so if a piece of plastic were to be dumped into the ocean it will ride various ocean currents eventually winding up in one of these gyres. The churning motion of the ocean breaks up larger pieces of plastic into pieces the size of your finger nail or smaller. In the gyre regions, it is estimated that there are 48,000 pieces of broken up plastic per square mile.