The coffee world has changed since Starbucks rose to prominence. Notonly has the sourcing of beans acquired wine-like precision, but nowthere are many small, local roasters. How'd this all happen? Episode 4brings you into the infrastructure underpinning third-wave coffee froma Kenyan coffee auction to a major coffee importer to a secret coffeewarehouse in San Leandro with beans from every coffee-growing nationin the world. We’re guided by Aaron Van der Groen, the green coffeebuyer for San Francisco’s legendary roaster Ritual Coffee.Learn more about your ad choices. Visit megaphone.fm/adchoices