Later this month, world leaders are set to endorse a U.N. goal to eliminate hunger by 2030, but they will have to convince their citizens to adopt new eating habits first, experts say. The shift, like the U.N. Sustainable Development Goals (SDGs) themselves, must apply to both wealthy and developing nations, where consumption of ecologically unfriendly foods is growing fastest. “Sustainable and healthy diets will require a move towards a mostly plant-based diet,” said Colin Khoury, a biologist at the Colombia-based International Centre for Tropical Agriculture.