Wired tells us, that the Hawaii Department of Education is switching to new, energy efficient classrooms because of high local power tariffs.
The new energy positive classrooms are “1,000-square-foot classroom projected to produce four times the energy it consumes—the result of eliminating the need for both artificial lighting and air conditioning.”
Most interestingly, its slating, jagged roof design is derived from the design of factories of more than a century ago.
Read more about it at Wired.com