You don’t need freshwater to grow crops. Don’t believe us? Just look at the horn of Africa where a company built the region’s first sustainable, drought-resistant greenhouse. Using solar power to pump in seawater from the coastline and desalinate it on site, the company is generating freshwater to irrigate plants, and water vapor to cool and humidify the greenhouse interior. In less than a year after its launch, the improbable desert oasis has produced its first harvest of tomatoes, lettuce, and cucumbers, displaying how desalination can work to combat drought and feed millions.