Not all edible crops are destined for the food shelf—almost 600 million hectares of land is used to grow crops for ethanol, for instance. That means vast quantities of corn, wheat, rice, sorghum, sugar cane, cassava, and sugar beets are going into cars’ fuel tanks instead of people’s mouths. The move toward electric and hydrogen-powered vehicles could take a significant chunk out of this market. If all of that land were converted back to food production—a big assumption, but go with it—we could feed 280 million more people, according to one study from the University of Virginia.