sentences:  On April 22, 1970, he founded the Dolphin Project, a non-profit marine environmentalist organization concentrating on Dolphins' welfare.Marine debris is defined as “any persistent solid material that is manufactured or processed and directly or indirectly, intentionally or unintentionally, disposed of or abandoned into the marine environment or the Great Lakes”.This debris can injure or even kill marine organisms; it can also interfere with navigation safety and could pose a threat to human health.