The United States’ first offshore wind farm is going to cost about $17,600 per home it will power. Private investors will turn a profit, and government officials can pat themselves on the back for having done something to combat “climate change.” But the owners of those homes, some of whom are already paying among the highest power rates in the nation, will end up shelling out nearly twice as much as the average American for this “green” electricity. Deepwater Wind, a private energy firm, put the finishing touches on the Block Island Wind Farm in August. The five wind turbines, each 600 feet tall, were installed in the Atlantic Ocean, just off the coast of Block Island, a 10-square-mile cay situated 13 miles south of the Rhode Island mainland. The turbines are expected to begin generating electricity in November.