Junk food ads are rife on TV, in movies, and online. It has even found its way into school cafeterias and vending machines. Though the link between junk food and childhood obesity has been well-established over the years, little has been done to address it. According to the World Health Organization (WHO), more than 1 billion people, including 650 million adults, 340 million adolescents, and 39 million children worldwide are obese. And, this number is still increasing. Despite the obesity epidemic across the world, many schools still have junk food lurking in their vending machines, cafeteria lines, and even on their lunch trays.