PECO Green Roof Tour

PECO recently installed Philadelphia's largest green roof on an existing building at it's 23rd and Market St. headquarters. The Pennsylvania Horticultural Society is offering a limited number of tours of this green roof. Space is limited so you have to register in advance. Check the PHS website for more information. While you're at building, be sure to check out PECO's other high-profile energy upgrade - the LED sign scrolling along the top of the building. (photo courtesy of Ari Barkan)