When someone leaves the plastic into the water. It will flow into the sea in an ocean. vortex of plastic trash in the Pacific will gather in different places together and have plenty. Most plastics do not degrade in the world it is it is deteriorating. Then break into small pieces. But it has not gone away. It's broken into smaller pieces. When it became smaller until the micrometer level. They were small animals that eat. later it will be eaten by larger animals to the food chain. When animals eat, it would be harmful to animals and can cause extinctions have. When people eat those fish can be dangerous to people as well.