For designers John and Cynthia Hardy, part of living sustainably is the usage of sustainable materials, namely bamboo. For this purpose, in cooperation with the Meranggi Foundation and PT. Bambu, they established the Green School in which the bamboo is the a primary building material as an effort to avoid the further depletion of rain forests. The Green School is located on a sustainable campus straddling both sides of the Ayung River in Sibang Kaja, Bali. There is a number of alternative energy sources that includes a bamboo sawdust hot water and cooking system, a hydro-powered vortex generator and solar panels. The campus consists of classrooms, gym, assembly spaces, faculty housing, offices, cafes and bathrooms. The result is a comprehensive green community with a strong educational mandate that motivates students to be more curious, more engaged and more passionate about the environment and the planet.