These pie charts describe the percentage of polluted ocean area in 1997 and 2007. The parts are measured in percents.

These pie charts describe the percentage of polluted ocean area in 1997 and 2007. The parts are measured in percents. Overall, it can be seen that in 1997 were slightly more sources of pollution, while, in 2007, this number decreased, but those which remained grew dramatically. The largest pollution was made by pollutants from air. […]