Which of the following is NOT a current economic benefit from ocean sediments?
a) Mining of diatomaceous earth
b) Drilling for petroleum deposits
c) Commercial collection of manganese nodules
d) Mining of sand and gravel
Answer: C
Which of the following is NOT a current economic benefit from ocean sediments?
a) Mining of diatomaceous earth
b) Drilling for petroleum deposits
c) Commercial collection of manganese nodules
d) Mining of sand and gravel
Answer: C