World's protein-calorie malnutrition problem won't be solved by the simple answers.
D002170:Canada; D003906:Developing Countries; D005523:Food Supply; D005524:Food Technology; D006801:Humans; D011155:Population Control; D011156:Population Density; D011158:Population Growth; D011502:Protein-Energy Malnutrition / Q000517:prevention & control*; D012106:Research