Come 2011, Harvard Law students will be breathing air processed through enthalpy wheels, reading under lights monitored by occupancy sensors and doing what comes naturally before waterless urinals. These and other green innovations—more than $1 million worth—are planned for the Northwest Corner development, the law school’s new facility being constructed at Everett Street and Mass. Ave. At 250,000 square feet, the building will be about twice as big as Langdell Hall. The goal is to achieve Gold LEED certification standards for environmentally responsible construction. The resulting reduction in wasted resources should recoup at least some of the costs over time. Take a look.