In front of them is a structure made of still-inert plastic leaves holding a 20-tonne concrete counterweight, hanging vertically like clothes in a European miners’ locker room. Their job: to lift them patiently, one by one, using a system of cables and pulleys, moving with animal slowness. Thus muscular energy (2,000 w/h) is transferred, stored and released, transformed, by means of a dynamo, into electrical energy. This endless cycle from elephant to structure to gravity and then to energy compresses or frees interior space, in rhythm with the occupation of the Land and the movement of the counterweight platform.The Land also features other alternative-energy experiments, including biogas developed by the Danish art collective Superflex.
Meanwhile, in Africa, the boundless energy of children provides the power for a new water management system. The Play Pump harnesses the energy of kids playing on a roundabout (or merry-go-round) to transport underground water into holding tanks—around 1400 liters per hour. As the inventor's website says, "Playing on a roundabout has always been fun for children, so there is never a shortage of 'volunteers'."