Engineer has developed a technology that converts energy from footsteps into electricity . Over the course of a month it was subjected to a machine that replicates the pounding of footsteps , non-stop every day , he added . First commercial order is to power half of outdoor lighting at vast London outlet mall . Sustainability expert says slabs encourage sense of collective participation . Hopes one day to reach across developing world to provide source of ` ` off - grid '' energy .
Engineer has developed a technology that converts energy from footsteps into electricity . First commercial order is to power half of outdoor lighting at vast London outlet mall . Sustainability expert says slabs encourage sense of collective participation . Hopes one day to reach across developing world to provide source of ` ` off - grid '' energy .