Green Umbrella has compiled a great looking Earth Week with events from several of Columbia's Environmental Student Groups and Departments! The events start Tuesday April 17th with a Green Roof Science Symposium from 9:00 am to 5:30 pm in Diana Center Event Oval @ Barnard College as well as a brownbag discussion titled What Happened with the Gulf Oil Spill? at 1-2pm in International Affairs Building Room 902. On Thursday catch Defining Sustainability: A Few Questions for an Expanding Discipline at 6:30 PM in Lerner 668, along with Climate Finance: Climate Change Policy Loands, A Comparative Perspective at 6 PM – 7:30 PM, Jerome Greene Hall room 103. Events will continue until Wednesday, April 15th! To get more information and to see the entire schedule, visit http://cugreenumbrella.wordpress.com/earth-week-2012/.