Malnutrition is the world's worst child health crisis and climate change will only make things more severe, according to Microsoft-co-founder turned philanthropist Bill Gates. Between now and 2050, 40 million more children will have stunted growth and 28 million more will suffer from wasting, the most extreme and irreversible forms of malnutrition, as a result of climate change, the Bill & Melinda Gates Foundation said in a report on Tuesday. “Unless you get the right food, broadly, both in utero and in your early years, you can never catch up,” Gates told Reuters in an online interview last week, referring to a child’s physical and mental capacity, both of which are held back by a lack of good nutrition.