Question

Which ocean resources are second in economic value to oil

Answer 1

Salt  and oil is the only thing i can think of.                                         .

Answer 2

Which of the following is NOT an energy resource obtained from the ocean?
1.C, Coal
The Persian Gulf, the Gulf of Mexico, and the North Sea are all known for their reserves of what ocean resource?
2.A, Oil
Which ocean resources are second in economic value to oil?
3.A, Sand and gravel 100%