Let's find out: add the extra food
How is that possible? Why are the extra people so hungry?
The coming years, many people will become rich enough to afford more meat...
But we already need to feed animals with grain to produce enough meat.
55% of the world’s crop calories feed people directly; 36% is for livestock and 9% biofuels (also a very dumb idea). Source: National Geographic
More meat means producing a lot more grains and soy to feed the animals.
In other words...