Stadiums are quite conducive to this kind of renewable energy initiative: They're huge, with a ton of open air and roof space for devices like wind turbines and solar panels that need both room and sun. There have been efforts to capitalize on that before, as well as some other ambitious plans like Qatar's solar-powered stadium--but that's more than a decade off, at least. The Eagles have made some strides toward these kinds of projects before, switching to 100 percent recycled paper materials (napkins, plates, etc), composting many tons of organic waste, and converting used kitchen oil to biodiesel. But this project takes it to a totally new level.