1. Define hydrates and methanol as used in para. 2 and 3.

2. Why did BP's attempt to contain the oil leak with a large underwater dome (Subsea Oil Recovery System) fail?

3. What solution is BP now going to try to contain the oil leak?

4. Why do engineers think this new attempt will succeed when the large dome failed?

5. Watch the video under "Background" below. What other attempt did BP make to stop the leak (but it failed)?

6. What assurance has BP's Chief Executive Tony Hayward given about the oil leak?