Bob Shaw glared at the executives from the chemical giant 3M across the table from him. He held up a carpet sample and pointed at the logo for Scotchgard on the back.“That’s not a logo,” fumed Shaw, CEO of the world’s largest carpet company, one attendee later recalled. “That’s a target.” Weeks earlier, 3M Company announced it would reformulate its signature stain-resistance brand under pressure from the Environmental Protection Agency because of human health and environmental concerns.Mills like Shaw’s had ...