While the Pacific garbage swirl is the largest on earth, David says there are actually five floating trash dumps plaguing the world's oceans.
"Anywhere where there is a current in our ocean, the plastic that makes up 90 percent of our marine debris is getting into the ocean," he says. "It aggregates and tends to pack together. So we are seeing a huge accumulation of plastic, these big human fingerprints, in our ocean right now."
David says there are four main polluters in our oceans—plastic bags, Styrofoam cups, Styrofoam containers and soda bottle lids.