Installed in 2003, the living roof on top of Ford's Dearborn Truck Plant is flourishing as an environmental touchstone amid the iconic Rouge Center. At 10.4 acres -- the size of eight football fields -- the living roof sustains a diverse ecosystem, removes CO2 from the atmosphere and reduces energy use at the F-150 assembly plant below. It also is part of an innovative storm water management system that reduces run-off and costs two-thirds less than a conventional treatment process.