Chicago has numerous policies in place to support green roofs and urban greening, implemented the most square feet of green roofs in 2008 of any city with 534,507, followed closely by Washington, DC at 501,042 and New York City at 358,986. Fourth through sixth top metropolitan areas included Vancouver at 320,000, Philadelphia at 196,820 and Baltimore at 150,032. ?EUR??,,????'??? Courtesy of Green Roofs for Healthy Cities