Check out this! How much more evil can you get than the actions of oil companies in Nigeria? I guess that a few darkies in a foreign land don’t matter much to most people, or Shell and Exxon would be sued out of existence by now. Calculations suggest that 1.5 million tons of oil has been spilled in the Nigerian delta over the last 50 years – 50 times what was spilled in the Alaskan Exxon Valdez disaster.
The article states that more oil is spilled each year in the delta than has so far been leaked from Horizon, which is measured in the millions of gallons, not tons. While one is a volume measurement,and the other is a weight measurement, you can roughly say that there are about 350 gallons of oil per ton.