So how good is the high you get from chewing Andean coca leaves? "It's a mild buzz," says Joshua Hammer, who journeyed across Bolivia to track the resurgence of the coca plant under President Evo Morales for the December 2007 feature story, "Coca Is It!" "It's fairly pleasant, and it definitely energizes you." Worried that the Bolivian coca surge will send us into another disco age? Relax. "It's not creating a new generation of druggies," Hammer says. "We have plenty of those from Colombian cocaine." Listen to our complete interview with Hammer here.