So often, when we try to solve a problem, we focus on what we can add. Let’s say you're moving to a smaller space. Your first thought might be to research shelving or rent a storage unit. But what if, instead, you subtracted? What if you thought about what you’d sell, donate, or just throw out?  That’s the question Leidy Klotz answers in his book, Subtract: The Untapped Science of Less. It’s a topic he was inspired to pursue while building a bridge of Legos with his son. Faced with a design challenge, Leidy chose to add Legos, while his son subtracted. That simple action – a highly counterintuitive one – set Leidy on the path to writing this book. It’s since become a lesson he’s working to apply to all kinds of problems, like climate change and sustainability. An Associate Professor of Engineering at the University of Virginia, Leidy studies the overlap between engineering and behavioral science, all in service of more sustainable systems. He’s worked with the Departments of Energy, Homeland Security, the National Institutes of Health, the World Bank, and ideas42. Episode Links The City We Became by N. K. Jemisin Subtract: Why Getting to Less Can Mean Thinking More Why Do Engineers and Behavioral Scientists Have to Learn from Each Other? Using Behavioral Science to Redesign the Built Environment Strider Bike Hazel Rose Marcus Michele Gelfand Pocket Park The Team Learn more about host, Gayle Allen, and producer, Rob Mancabelli, here. Support the Podcast If you like the show, please rate and review it on iTunes or wherever you subscribe, and tell a friend or family member about the show. Subscribe Click here and then scroll down to see a sample of sites where you can subscribe.