For the designers John and Cynthia Hardy, the usage of sustainable materials is very important. And bamboo is implemented in their design. For this idea, in collaboration with the Meranggi Foundation and PT. Bambu, they established the Green School in which the bamboo becomes the primary building materials. It is also intended 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 are a number of alternative energy sources included here such as 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 which is able to motivate the students to be more curious, more engaged and more passionate about the environment and the planet.