Seattle SBA Program students toured one of the greenest commercial buildings, the Bullitt Center in Seattle, Washington. Tour guide Rob Peña talks about the filter units for the rainwater collected from the roof for re-use inside the building and for irrigation. (Photo courtesy SBA Program)

Seattle SBA Program students toured one of the greenest commercial buildings, the Bullitt Center in Seattle, Washington. Tour guide Rob Peña talks about the filter units for the rainwater collected from the roof for re-use inside the building and for irrigation. (Photo courtesy SBA Program)

Seattle SBA Program students toured one of the greenest commercial buildings,
the Bullitt Center in Seattle, Washington. Tour guide Rob Peña talks about the filter units for the rainwater collected from the roof for re-use inside the building and for irrigation. (Photo courtesy SBA Program)