Al Gore may have an Oscar, a Grammy and a Nobel Prize on the mantle of his solar-powered, carbon-free fireplace, but he's being one-upped by a controversial environmental activist named Annie Leonard. The California-based filmmaker has an online hit with "The Story of Stuff," a 20-minute video that is being used in thousands of schools to explain America's dangerous obsession with material things — and one that some critics are calling a misleading diatribe against capitalism.