Once considered an issue only for environmentalists, renewable energy has entered the mainstream dialogue as fears of climate change, acid rain, and dependence on foreign sources of fuel become more prevalent. There is now broad support for adding renewable energy, including wind power, into our nation’s fuel mix. Technological advances have allowed wind power to compete with traditional fossil fuels and lessen other potentially harmful impacts. Land-based wind power is widespread globally, and offshore wind facilities have been operating in Europe for over a decade. While there are currently several proposals for large-scale offshore wind farms in the United States, no such facilities have been sited to date. An intense legal controversy has emerged, stemming from a proposal to site a wind farm off the coast of Massachusetts. The outcome of this dispute will have important consequences for future proposals for offshore wind farms.