Taking a cue from good ol' Ben Franklin, this electrifying tower design would harness bolts of lighting to smash molecules of water into hydrogen and oxygen. The result is clean hydrogen power that emits only water vapor and heat. Called Hydra Tower, the skeleton-like spire is made of graphene, a carbon super-material that is highly conductive and perfect for pulling energy straight from the sky. Just don't stand too close to it unless you want your next hairdo to channel Don King.