Environmental Research Foundation . . P.O. Box 5036, Annapolis, MD 21403 . .
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To subscribe, E-mail the words . . The earth looks large. But the appearance of great size is deceiving. The oceans average only 2.5 miles deep and at their deepest they are only 7 miles. If the surface of the planet were smooth, without valleys or ridges, it would be evenly covered with water to a depth of one and three-quarter miles.