Anna Cummins and Marcus Eriksen of the Algalita Marine Research Foundation tell us about the perils of plastic on land and in the sea. Marcus and Anna also talk about some of their many adventures; JUNKride; a 2,000 mile bike ride from Vancouver, B.C. to Tijuana, Mexico, the voyage of the JUNKraft; a boat made of plastic bottles, and their trip to the North Pacific Gyre, where they investigated plastic in the ocean.