Posidonia oceanica seagrass (IMAGE) University of Barcelona Caption This natural mechanism could trap about 867 million plastic per year in coastal areas. Credit Jordi Regàs Usage Restrictions The image may only be used with appropriate caption or credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.