The world’s most efficient wind turbine went to work today in Norfolk, Britain. The 220-foot turbine is thought to be the tallest in Europe and is 50 percent more powerful than the next largest turbine in the U.K. It will supply energy to the national grid, generating enough power for about half the local population around the town of Swaffham. The project’s developers hope the single, large turbine will convince the public to support wind energy, which has run into opposition when large numbers of small turbines are built on hills. But some locals are already objecting to the towering structure.