Ocean Pollution Trends: A Comparative Analysis of Sources (1997-2007)

The pie charts compare the sources of environmental contaminants in an ocean region between 1997 and 2007. Overall, air pollutants were the primary source of contamination in the ocean over this ten-year period.

In 1997, the seawater region showed that nearly one-third of the pollutants originated from the air, making it the dominant source of pollution. Domestic industrial waste also contributed significantly, accounting for 22%. Marine waste and transport combined made up roughly 35%, while farm waste, oil spills, and litter played minor roles in regional pollution.

By 2007, although the percentage of air pollutants had increased by an additional 3% compared to the past decade, it was overshadowed by a substantial increase in domestic industrial waste, which rose to 36%. Additionally, oil spills accounted for 15% of contaminants, which was three times higher than before. However, farm waste, marine waste, and transport were no longer significant contributors.

Interestingly, litter, which accounted for 4% of pollutants in 1997, had completely disappeared by 2007, suggesting a possible indicator of environmental improvement.