![](https://www.azavea.com/wp-content/uploads/2012/09/prog_GreenBuilding1.jpg)
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prog_GreenBuilding
Published at 280 × 150 in BBL: Katherine Gajewski and the Mayor’s Office of Sustainability Are Making Philadelphia the Greenest City in America
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Published at 280 × 150 in BBL: Katherine Gajewski and the Mayor’s Office of Sustainability Are Making Philadelphia the Greenest City in America