An exploration by the heads of sustainability of the world's biggest buyers — Walmart and Amazon — joined by the former Assistant Secretary of the U.S. Air Force (now head of RMI's Business Renewables Center), tackling deployment of clean energy and sustainability solutions at a global scale with a focus on economic prosperity and global impact. How are they transforming markets by making changes across their massive supply chains? And what will it take for other businesses and local governments to collaboratively take advantage of market changes to advance a cleaner, more resilient economy?