Marine litter results from human behaviour, whether accidental or intentional. The greatest sources of it are land-based activities, including: waste released from dumpsites near the coast or river banks, the littering of beaches, tourism and recreational use of the coasts, fishing industry activities and ship-breaking yards. Storm-related events, like floods, flush the resulting waste out to sea where it sinks to the bottom or is carried on coastal eddies and ocean currents. The major sea-based sources include: abandoned, lost or discarded fishing gear shipping activities and legal and illegal dumping.