I'm thinking of those millions of people everyday huffing and puffing in gyms on treadmills and stepladders, and all that energy going to waste. Why not harness it to generate electricity? Hey gyms, how about it? Good way to save on your power costs too!
And how about children? Have you seen how much energy they expend - all that hyperactivity. Why not a device to capture and store that energy generated at playgrounds and kid centres, for use elsewhere?
