ROUTE 83, south of Minot, North Dakota, is a particularly barren stretch of a barren state. Last year, however, nearby fields sprouted a new crop: a $250m, 80-turbine wind farm. Not far west is Fort Berthold, home to the Mandan, Hidatsa and Arikara Nation. Wind hurtles across the reservation, careening around houses and over hilltops. The Indian tribe has just one turbine to catch it.