Although I’m not especially worried by higher fuel prices—in my opinion, they’ll help accelerate a much-needed movement to electric vehicles, which in turn will force us to use more nuclear and solar power—one of the things I’ve routinely wondered is how planes will deal with the problem. To me, the only solution seemed to be to use hydrogen (rather explosive) or increasingly expensive gas propellants. It turns out, though, that small planes can be powered by batteries—and someone has already made a battery-powered propeller plane. It’s quiet, clean, and can fly for 90 to 120 minutes—enough for a pleasure cruise. And the best part? It costs a mere 60¢ to refuel the craft.

Count me in.