TED】エレン・グスタフソン肥満＋飢餓＝1 グローバルな食糧問題 (Ellen Gustafson: Obesity + hunger = 1 global food issue) (【TED】Ellen Gustafson: Obesity + hunger = 1 global food issue (Ellen Gustafson: Obesity + hunger = 1 global food issue))