Chester County (Pa) Library To Have Green Roof
Tredyffrin Township (Chester County, Pa.) is expanding and upgrading their Strafford-Wayne library branch. 
Part of the project includes plans to install a green roof. "Green roofs are layers of living vegetation installed on roofs". The new roof is "expected to increase energy performance ... , reduce airborne emissions, extend the life of the roofing material beyond its normal life span, help manage stormwater, and serve as a model to educate and encourage the public about the benefits of green roofs".
Via: Tredyffrin Twp Newsletter Vol. 21 Issue 3 Fall 2007 Link (not yet posted as of 9/4/2007)