Grist: Last month, standing at the Old Capitol Pump House, a restored building along the Anacostia River, Washington, D.C. Mayor Vincent Gray announced the launch of the long-awaited Sustainable D.C. plan. The result of an amazing public outreach process that involved over 400 local green experts, more than 180 public meetings involving 5,000 people, and 15 D.C. government departments and agencies, the plan is an attempt to make D.C. the greenest, healthiest, and most livable city in the U.S. by 2032....