15 Greenest Mayors

Call New York the accidental eco-city: cram millions of people onto an island, and you've got to figure out how to build up, not out. Construct a big park in the middle, and voila: you've got an anti-sprawl city that values open space. Recognizing that his city’s limited space necessitates eco-friendly policies and planning, Bloomberg has created an ambitious 127-point initiative called PlanNYC 2030 that encompasses everything from reclaiming waterfronts to repairing electrical grids to reducing traffic congestion. (Okay, that last one hasn't gone so well.) A year after unveiling the plan in 2007, the city had launched a full 93 percent of its components.