The U.S. government is taking steps to develop offshore wind farms off both coasts. Interior Secretary Ryan Zinke announced this week the Bureau of Ocean Energy Management will hold an offshore wind auction Dec. 13 for nearly 390,000 acres (157,831 hectares) of ocean off Massachusetts.Zinke said the area, if fully developed, could supply power to nearly 1.5 million homes.He also announced the bureau is opening its environmental review of a 15-turbine project off Long Island, New York, proposed by Deepwater Wind, operators of the nation's lone commercial wind farm off Rhode Island.And in California, Zinke announced the bureau is seeking comment on possible areas for wind development off the state's central and northern coasts.The administration hopes that will lead to the West Coast's first offshore wind auction.