Texas utility officials gave preliminary approval to a $4.9 billion proposal to bring wind-generated electricity to urban centers in what would be the largest such investment in U.S. history. The state leads the nation in wind power, although a dearth of transmission lines has limited the amount of power that could be harnessed and used. "We have all these wind plants up and operating. What we're asking for is the superhighway to get the energy to the cities," said Tom Smith of the consumer group Public Citizen.

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