Back in October 2009 in our post “Green Roofs Address D.C.’s Environmental Problems”, we covered the research the American Society of Landscape Architects was doing with the green roof on its National headquarters and the many benefits it provides. I recently came across this well produced video tour of ASLA’s green roof (see below). It does a wonderful job of showing off the space and the diverse habitat that has been created. I particularly love the areas that use the steel grating to span some of the green roof areas. Enjoy.