The pie charts compares the proportion of pollutants of a specific region of ocean from 1997 to 2007.
Overall it can be seen that the ocean pollution by domestic swage and offshore oil increasing, whereas that of in others way dropping.
In 1997, air pollutants are accounted for a third of ocean pollution, which is the major cause of damaging. In contrast, litter, offshore oil and waste from farm was produce similar amount of pollutants, which is about 4%. Ocean is polluted by domestic swage and industrial waste 18% and 17% respectively. Marine accounted for a quarter in ocean pollution.
In 2007, domestic swage increased significantly and air pollution remained stable, both contributed a third of ocean pollution. Pollution by litter and firm waste almost stop produce pollution and the least contributor of damaging ocean. Industrial oil and marine accounted for 9% and 17% respectively of pollution, which dropped by 8% and 5%. Pollution increased by offshore oil from 5% to 14%