Carbon Free Energy
My idea is we should put these econuts on bicycles and whip them soundly if they stop peddling. Think of all the energy that could be generated by all those spinning bicycle wheels. Only one thing wrong, though. The bicycles would have to be produced in a factory that likely produces CO2, in China, probably. But then China already has a general pass on all things related to CO2 production, so that should be alright.