Diet soda is one of the few things in life that makes Harry very happy. And it turns out, it might be disappearing as “zero sugar” infiltrates the carbonated industry. Why is this happening all of a sudden and is there a difference between the two labels? Or is this just a war of words? If you enjoy Margins of Error, CNN would love to hear from you. Please visit: cnn.com/margins to take a brief survey. To learn more about how CNN protects listener privacy, visit cnn.com/privacy