People only need 2000 calories a day. However, the world’s average calorie consumption is rising.
At the current pace, in 2050 we’ll be eating 3,070 calories a day. (equal to five Big Macs, or over 20 cans of Pepsi in a day)
Per: CGIAR Research Program
Yet while 1.4 billion adults are overweight, 842 million are undernourished.
Interesting that we have Obesity and Starvation simultaneously happening in the world.