With the global population expected to jump from 6.8 billion to more than 9 billion by 2050, the [The Future of Food and Farming] report predicts that farmers will need to produce 70 percent more food while using the same amount of land. Since this will be extremely difficult—if not impossible—people will need to drastically reduce their meat consumption in order to stave off food shortages.
This is because raising animals for food is grossly inefficient: Animals consume large quantities of food but produce comparatively small amounts of meat in return. More than 70 percent of the grain that we grow in the U.S. is fed to farmed animals.
It’s worth considering. If people won’t go vegan for the animals or for the environment, maybe they’ll consider going vegan in order to prevent human starvation.