According to one of the world’s leading, net-zero energy builders, the population has outgrown its manufactured water systems. Matt Grocoff is founder of the Thrive Collaborative and has installed a rainwater system at his Ann Arbor home that he is working to make the water system of the future. In this conversation with WEMU’s David Fair, Grocoff explains why a shift in the way we engineer our water systems is a necessity and how it can work on this week's "Issues of the Environment."