The idea arrived while he was working at energy company E.ON. As with all good inventors, people told him he was crazy; but his breakthrough moment came when he realised a flywheel technology would work. We’re at an inflection point where younger generations are taking positions of responsibility and see the value we bring. The aim is to make Pavegen the same price as ‘normal’ flooring, and it can be installed in the same way. “We believe the footsteps of millions can power cities in the future,” Kemball-Cook says; “We make energy fun.” Main image: Pavegen