When we were growing up, my Mom thought it would be great to connect four stationary bikes (one for each of us kids) to the television and we'd all have to keep peddling for the TV to power up.

Now, there is a new gym in Portland called the Green Microgym which is the first health club in the world to generate a significant portion of its own electricity by putting the sweat power of its members to work. It would be quite a commute for me (doesn't make sense to drive to so far to go to a green gym, right?), but for the neighbors it sounds very cool.

Now, I am just waiting for the electricity-generating daycare or playground (why not tap into the energy of all those little kids?) or the wide-spread use of the electricity-generating nightclub dance floor. These might be a great solution not only for those who want to save energy, but for those in rural areas and in emerging regions where reliable power is elusive or too expensive.