The green roof on the new Walmart opening at Portland's North Hayden Meadows is the largest in the city and the only roof like it that Walmart has on the West Coast.
Nearly half of the 92,000-square-foot roof is green, covered in vegetation and sediment to manage storm water. It will also help cool the store and convert carbon monoxide to oxygen.
Portland State University will use the roof for a classroom as part of its Green Building Research Lab. For two years students will study the roof’s eco-impact using remote sensors and a weather station.
Read more at KGW.