City resident and co-founder of Help Delhi Breathe, Reecha Upadhyay, tells us how she rallied tens of thousands of voters to pass legislation that will help cap air pollution killing millions every year. She discusses biomimcry with Clare Miflin, who shares her epiphany that nature doesn’t create any waste and that perhaps our misuse of materials is a design flaw. We hear how Clare took her thought to the NYC’s Department of Sanitation and developed the Zero Waste Design Guidelines. And we take a trip to Freetown, Sierra Leone to visit Mayor Yvonne Aki-Sawyerr, to hear how she watched her beloved city become ravaged by war and disease, before putting it on a path to future green thinking and economic potential.