| Comparison of Estimates of Petroleum Hydrocarbons Annually Entering in the Marine Environment (1970 to 1992) | ||||||
| (Qty. in Million Tonne/yr.) | ||||||
| Sources | MIT SCEP Report (1970) | USGC Impact Statement (1973) | NAS Workshop (1973) | FOH Norway Report (1981) | NRC Report (1985) | UNEP (1992) |
| Marine Transportation | ||||||
| Offshore Oil Production | ||||||
| Coastal Oil Refineries | ||||||
| Atmospheric Depositions | ||||||
| Natural Sources | ||||||
| Land Based Activities/Municipal/Urban/River/ Runoff/Industrial Wastes | ||||||
| Total | ||||||
