Currently, there are more than 176 "green" colleges and
universities, according to the U.S. Green Buildings Council, and the number continues to grow. Among them is Portland State University. Their newest engineering building has natural lighting, and natural ventilation. Rainwater is also captured on rooftops and treated on site to be used to flush toilets. Combined with the use of low flow toilets, sinks and showers,
school officials say the campus consumes 40 percent less water
than state guidelines....