The Interior Building in Washington, D.C. Gets a "Green Roof"

Green roof atop Chicago City Hall
The National Park Service's parent agency, the U. S. Department of the Interior, recently completed a project with both literal and symbolic "green" benefits. Earlier this week, Secretary of the Interior Dirk Kempthorne helped unveil a "green roof" located on the 3rd wing of the Main Interior Building in Washington, D.C.