WHYY Regional News Chester County: ‘Mushroom Capital of the World’ By Kenny Cooper | WHYY Published September 11, 2022 at 8:00 AM EDT Facebook Twitter LinkedIn Email Listen • 1:05 Waldemar Brandt / Unsplash Did you know Chester County produces half of the nation’s mushroom supply? WHYY’s Kenny Cooper has more.(Original air-date: 9/9/22)