Jessica Dailey, writing at Inhabitat, notes the United States’ largest net-zero school, Lady Bird Johnson Middle School, in Texas:

Texas is known for the Alamo, spicy Tex-Mex food, big Stetson hats, and now it also has the nation’s largest net-zero public school. Welcoming its first students this past fall, the Lady Bird Johnson Middle School in Irving Texas is a 152,000 square foot facility that produces as much energy as it uses thanks to wind turbines, solar panels, and a slew of the most advanced green technologies and building techniques. Dallas-based firm Corgan Associatesled the design team, which incorporated a variety of experts to create a school that serves not only as a classroom, but also as a teacher of sustainability and energy-efficiency.

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Apparently the building is powered by a large solar array and a smaller array of wind turbines, producing in a ratio of 99 to 1; the 152,000-plus square foot building also uses geothermal energy, employs every conservation tactic available, and still has some power to sell back to the grid.