In this article I will discuss a technology for making effective use of the energy and resources to be found in the ocean. The oceans cover 70% of the earth's surface. Ocean thermal energy conversion exploits the thermal energy derived from the temperature difference of the surface seawater and deep seawater to generate electricity. I will discuss technologies which; produce hydrogen through electrolysis of purified water that has been desalinated; retrieve lithium contained in deep seawater; and create fisheries by utilizing the highly nutritive salts found in deep seawater. Finally, I will explain the economic effects of each of the technologies.