1. The oceans of the world occupy over 70 percent of the earth's surface.
The oceans of the world occupy a large proportion of the earth's surface.
2. Food from the sea provides between 5 percent and 10 percent of the total world food supply.
Food from the sea provides a small proportion of the total world food supply.
3. Of the earth's seven billion people, over one billion rely on fish as a primary source of protein.
significant proportion of the earth's 7.0 billion people rely on fish as a primary source of protein.