Reading Comprehension: Oil Rig Sinks - Answers

Questions:
What caused the rig to sink?
A fire resulting from an unknown explosion.

How did most of the workers escape?
Most of the workers were rescued after escaping on lifeboats.

Why has the released oil not yet had a large environmental impact?
Most of the oil that has been released been burnt off.

What is suspected of causing an explosion?
An uncontrolled release, called a blowout, is suspected of causing the explosion.

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