There are at least two major spills now spreading across the gulf.
There is always the risk of a major spill from a pipeline or a production plant.
Pipelines designed to flex have snapped - Katrina's damage may include 10 major spills.
How does an ecosystem recover from such a major spill?
The first is that industry, despite all sorts of rosy promises, has neither the will nor technology to contain a major spill.
Mr. Miller said the business association had begun to collect information on how companies could help in the event of a major spill.
The Coast Guard quickly declared the accident a major spill.
Should oil companies be allowed big tax breaks for the cost of cleaning up a major spill?
Ricki had to steady a beaker of liquid to prevent a major spill.
Another divisive issue has been whether to join an international liability fund to help clean up major spills caused by foreign vessels.