Several universities have held "ECOlympics" competitions among dorms. As far as I can tell, MIT has never done this. How about one division for dorms and one for workspaces/labs? Given the nature of the MIT campus, thinking about workspaces and labs, how to evaluate and score it would be an interesting challenge and demo for the world. As we have GetFit for our bodies, surely we can do similar for our campus.
American University: http://www.american.edu/finance/sustainability/ECOlympics.cfm
U of Louisville: http://events.louisville.edu/event/ecolympics_2016#.Vtc8X_krKHs