In advance of Earth Day on Friday, the District today kicks off its Green Week DC today with Environment and Community Day on Freedom Plaza from 10 a.m. to 3 p.m. Tuesday is Holistic Energy Day at the Reeves Municipal Center at 14th and U streets NW where you’ll be able learn more about renewable energy and see GM hydrogen vehicles. Although pretty much a concrete courtyard, Nassif Plaza at the U.S. Department of Transportation…