The world has 7 oceans and they are all being neglected in some way or another, some people try to save them but there's only so much they can do. The oceans have suffered at the hands of mankind for millions of years. The chemical change in the water is causing hundreds of animals to wash up on the shores died. On a microscopic level the ocean have been dying for a long time but most people never noticed until something on a large scale died. The oceans may be damaged beyond repair, but every little bit can still help the ocean in the future. Pollution in the ocean can date all the way back to the roman era, but it was on a small scale compared to today. The ocean have endured 1.3 million gallons of petroleum
