What if you can create sustainable, clean energy just by taking a walk? Well, you can, thanks to Laurence Kemball-Cook. His energy harvesting startup, Pavegen, has pioneered a flooring tile that converts wasted kinetic energy from footsteps into renewable electricity, which has the ability to transform smart cities of the future, entirely through footfall. In this Fika break, we spoke to Kemball-Cook about energy harvesting, fighting climate change, and weathering the ups and downs of entrepreneurship.