New York City’s Department of Environmental Protection has committed to investing $2.5 billion in green infrastructure over the next two decades, including “blue roofs” that hold rainwater, parking lots paved with porous concrete, and vacant paved lots turned into gardens. Close to $7.0 billion will be saved that would otherwise be required for “bricks and mortar” infrastructure like underground storage tanks and tunnels. Learn more: http://bittman.blogs.nytimes.com/2011/11/21/breaking-new-ground/