Which of the followings statements applies to resources from the sea?

All of the following resources are recovered from seawater except:

The best fishing grounds are located

What accounts for most of the total value of world trade transported by sea?

The only marine energy source being successfully exploited on a large scale is:

The most dangerous threat to the marine environment, overall, is probably

The ozone layer is important because

If hope exists for solution to environmental problems, it lies in

About what percentage of Earth's surface is covered by water?

The world ocean

The best explanation for the failure to find all sunken ships is that

Earth is about

Life on Earth most probably evolved

What is the name of the outermost solid layer of Earth?

The youngest seafloor rocks are found:

Which of the following statements does not correctly describe subduction zones?

The mid-ocean ridges are recognized as:

The sediments that covers the greatest area of seabed

The most abundant sediment in the ocean

Generated in place, on the spot where we find them

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