 This week, the California Energy Commission unanimously approved a plan that requires 26 ports up and down the state's coast. Initial estimates suggest it will require billions of dollars in public and private funding just to prepare the coast for the installation of the turbines. Supporters of the technology say they'll pay for themselves in the long run by generating clean energy. Critics say there's nothing clean about them, and turbines have a history of malfunctioning, and they've been known to kill birds with their giant spinning propellers.