Once considered a rich country problem, obesity and excess weight is rising worldwide – with some 44% of people globally struggling with being overweight or obese. Perhaps surprising to some, 70% of those who face overweight issues live in low- and middle-income countries, according to the latest research.So what’s driving these trends? What do they mean for global development? And what can we do to address them? To find out, Expert Answers’ Paul Blake caught up with Meera Shekar, Global Lead for Nutrition at the World Bank.