Sustaining the Unknown Seas: Changes in U.S. Ocean Policy and Regulation Since Rio '92
Introduction
Oceans cover more than 70% of our planet.1 With an average depth "about five times the average elevation on land,"2 the world's oceans hold "about 97% of the total water on earth"—a massive amount compared to the 0.02% of the earth's water found in inland lakes, channels, and seas.3 Oceans were the cradle of life on earth, supporting primitive life forms that arose "approximately 3.5 to 3.7 billion years ago."4 Today, scientists estimate that, conservatively, "more than 250,000 different types of plants and animals live in oceans"; some estimates run as high as 10 million species.5 In addition, water evaporating from oceans drives the earth's hydrological cycle6; "seawater dissolves large quantities of existing carbon dioxide (CO2) from the atmosphere"7; and oceans play a significant role in the earth's weather.8
Despite the obvious importance of the oceans to the well-being of the world, however, our knowledge of this vast expanse is extremely limited. "We are better informed about the Moon and Mars than about the bottom of the ocean floor; we know more about the life cycle of stars than those of the sperm whale, giant squid, and many of the creatures sought by the world's fishing fleets."9 Given this ignorance, for much of history humans have looked at the ocean's size and refused to believe that they could do it any real harm. As little as a quarter of a century ago, the sustainability of the oceans seemed like a non-issue.10