Nantucket Sound, a slice of water wedged between the islands of Martha’s Vineyard and Nantucket and Cape Cod on the mainland, is a lovely place. It’s chock full of fish and, when it’s not cold as all get-out, tourists. And there was a time, not too long ago, when those in favor of alternative energy thought Nantucket Sound would also be the home to a huge offshore wind farm. Giant wind turbines, some of them 420 feet tall, were scheduled to be scattered around a 24-square-mile area. Then Congress, or rather a congressman from oil-rich Alaska, stepped in to effectively...