For decades, Italy symbolised healthy eating. Fresh vegetables, olive oil, whole grains, legumes and fish made the Mediterranean diet famous across the globe. But a recent BBC report tells a very different story.In southern Italy's Campania region, more than 40% of eight- and nine-year-old children are overweight, making it one of Europe's worst-affected areas. The report follows teenagers like 17-year-old Salvatore, who weighs 170 kg and is waiting for treatment for severe obesity, highlighting how dramatically children's health has changed.The World Health Organization (WHO) has also warned that childhood obesity has become a global epidemic, with the number of children and adolescents living with obesity rising sharply over the past few decades.