Obesity is a big concern among US children, with nearly one-third of them either overweight or obese.<br /><br />Junk food marketing is a contributory factor to such problems, according to the Washington-based Institute of Medicine.<br /><br />Now, Walt Disney, one of the world's largest mass media companies, has decided to join the fight against obesity.<br /><br />The company, known for its popular theme parks, plans to ban commercials for junk food on its widely watched children network Disney TV, radio, web channels - and inside the theme parks themselves.<br /><br />Al Jazeera's John Terrett reports from Washington.
