Check out this incredibly cool scheme for power generation – an air rotor. Imagine a helium balloon the size of a large pickup truck and shaped something like a ridged watermelon, tethered in your backyard. The wind causes the balloon to rotate, which generates power that’s brought down to the ground via the tether. Aside from your neighbors maybe not digging the giant balloon in your yard, this seems like the coolest power generation scheme ever. Couple this with an air car and you’re living in that jetson’s future you always dreamed of.