Wind turbine blades on a roadside near Messolonghi, Greece, awaiting assembly. Wind turbines produce electricity at between two and six cents per kilowatt hour, which is one of the lowest-priced renewable energy sources. Over 1, 500 tons of carbon dioxide per year can be eliminated by using a one-megawatt turbine instead of one megawatt of energy from a fossil fuel. Permanent magnets for wind turbine generators contain rare metals such as neodymium, praseodymium, Terbium and dysprosium