PS68 Mass Participation Sports such as marathons, park runs and bike rides accrue large and lasting benefits to tourism, public health and community engagement. But they also create a lot of waste – from runner bibs and number tags for the participants, to posters and signage for directional or aesthetic reasons, and, packaging from food & drinks consumed by spectators, participants and contractors. How can technology solve for a reduced carbon footprint and more sustainable delivery of such events?