The installation of two buoys less than a mile off the Hawaiian coast marks the first fully functioning venture into wave-energy technology in the United States. As the buoys bob up and down, they turn energy from the ocean’s movement into electricity, which travels ashore to Oahu’s power grid through an undersea cable. The test project produces only enough power for about a dozen households. And although the development of wave energy technology lags decades behind wind and solar, wave power has huge potential. The U.S Department of Energy projects that waves off the U.S. coastline could power more than 200 million homes.
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