In Detroit Michigan prairie grasses now fill spaces that dwellings once occupied. Old trees remain among fragments of foundations, driveways, patios and walkways, marking the place where houses once stood. Empty fire hydrants and sagging utility poles offer a glimpse into the once thriving neighborhoods which existed here. New signs of life abound. Entire urban blocks have become prairie fields, some extending for blocks and spanning streets, root systems breaking concrete up as nature is left to take over, unrestrained. As abandoned buildings become overgrown and decompose, the fabric of the city changes. This is the greening of Detroit.