Despite predictions that global warming and overpopulation would cause massive famines, the portion of the world's people who are undernourished declined from 15% in 2000 to 11% in 2017. During this period, the global population increased by 20%, and the average global atmospheric temperature rose by about 0.3 degrees Fahrenheit. Likewise, the average number of calories needed to lift the undernourished people of the world out of that condition decreased from 172 calories in 1992 to 88 calories in 2016. Thus, the United Nations reported in 2017: "With the increases in food supply in recent decades, the world now produces more than enough food to satisfy the dietary needs of the entire global population."