Reuters: A plan to build the United States’ first offshore wind farm took another step forward on Tuesday, after the Massachusetts Department of Environmental Protection approved its proposed undersea cables to transmit power to the mainland. The Cape Wind project, which would place 130 turbines about 4.7 miles off upscale Cape Cod, would provide “greater public benefit than detriment,” the state review found. The proposed wind farm, opposed by beachfront homeowners who complain the …