CITIZEN POWER ALLIANCE

Amid a national debate over offshore oil drilling, the federal government is preparing to unleash development of another offshore energy source: wind.

The Interior Department, the agency that handles oil-and-gas leases in U.S. waters, is preparing to lease swaths of the outer continental shelf to companies that want to erect massive wind turbines. With the public-comment period for the proposal scheduled to end Monday, competition is heating up to develop wind projects on the shelf, the same underwater formation largely covered by an oil-drilling ban that has become a contentious issue in the presidential race.

The federal program signals the start of a broad push to develop offshore wind energy in the U.S. The country often is dubbed by renewable-energy experts as "the Saudi Arabia of wind" because of its vast, windy expanses, particularly in the Western plains. Now, rising interest in renewable energy is spurring exploration of the ocean, where the winds typically are heavier but the technological hurdles to tapping it are higher. That shift mirrors the oil industry's move to offshore wells decades ago.

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