Sources and Estimated Annual Average Amounts of Oil Entering North American Waters
Monday, September 10, 2012
Sources and Estimated Annual Average Amounts of Oil Entering North American Waters
| Source | North American | Worldwide | ||
|---|---|---|---|---|
| Million gallons | Percent | Million gallons | Percent | |
| Natural seeps | > 47.0 | >180 | ||
| Petroleum extraction | 0.9 | 3 | 11 | 5 |
| Petroleum transportation | 2.7 | 9 | 44 | 22 |
| Petroleum consumption | 25 | 86 | 140 | 72 |
| Total (anthropogenic) | 29 | 195 | ||
NOTE: Percentages do not add to 100% due to rounding.
1 North American waters include those of Canada, the United States, and Mexico.
SOURCE: National Research Council, Oil in the Sea III: Inputs, Fates, and Effects (Washington, DC:National Academy Press, 2002).