Those spiky things around the stadium's top? Those are 20-foot-tall wind turbines. 80 of them
The Philadelphia Eagles announced a partnership with Solar Blue to completely re-green their stadium (and to make endless puns about "greening" the team with the deep green uniforms). It's actually pretty groundbreaking stuff: They plan to use a combination of on-site wind turbines, solar panels, and a dual-fuel (biodiesel and natural gas) plant to run on completely self-generated renewable energy by September 2011. It'll be the only stadium in the world that can make that claim.