Fewer calories, just as sweet? Argentina’s natural, low-cal Coke

By Ian Mount | August 9, 2013, 3:00 AM PDT Stevia rebaudiana plantBUENOS AIRES — Argentines love their soda. In fact, they’re the world’s leading consumers of soft drinks, according to research firm Euromonitor International, chugging 131 liters of the stuff per capita each year. So the appearance of a new soft drink on store shelves — a Coke in…