Natural ventilation, operable windows, clerestory windows, solar chimneys, wind towers, cross-ventilation, stack effect, air-side economizers, heat recovery systems, radiant cooling panels, chilled beam systems, displacement ventilation, underfloor air distribution, raised access flooring, mixed-mode ventilation, demand-controlled ventilation, sensor-activated systems, automated shading devices, electrochromic glazing, prismatic lenses, solar screens, motorized louvers, exterior sunshades, vertical green walls, living walls, bio-based building materials.