In a previous entry I wrote about a design for a "rubber band car", But after watching the documentery "Who killed the electric car?" (a movie I highly recommend!), I think I have a much more practical idea: It is currently possible to make an electric car that can run for at least 150 kilometers on a single charge and be recharged at home or anywhere using a standard electrical outlet in as little as a few hours. These EV1 created by GM in the mid 90's were one of a few of these cars...

As I am interested in any green energy concepts, I am pleased with current developments in hybrid vehicles. I would like to see the hybrid concept grow to include several different energy sources feeding power to one electric engine. This may sound goofy, but one idea I have is to use giant rubber bands as a sort of mechanical battery that could spin a generator that would feed the electric engine of a car. The bands would run beneath the car in long plastic tubes and could be wound with...