The battle against hunger is quite literally, an existential one. But there was a time when winning that battle seemed within reach - as production surpluses could have meant enough food for all. But climate change, conflict, and a broken food system have threatened that goal. Ukraine, a big provider of wheat to the world, is unable to export grain amid a blockade of its Black Sea ports, such as Odesa. While millions of tonnes of grain sit stuck in silos, countries dependent on these supplies have been left in a desperate situation. Starvation and malnutrition threaten the lives of tens of millions in places like Yemen and the Horn of Africa. Supply shortages have worsened the humanitarian crises.