Subtitles section Play video Print subtitles Wheat is one of the most important things that we eat. It's turned into staple foods that make up 1/5 of all calories consumed in the world. Most of Northern Africa and the Middle East depend on cheap wheat imported from Ukraine, but supplies of the grain were cut off after Russia invaded. Some Ukrainian farmers couldn't plant seeds this spring, and over 4.5 million tons of wheat are stuck at the ports unable to leave the country, But the supply chain that moves wheat globally was fragile. Even before the war droughts. Heatwaves and floods have ravaged crops from the US to India and driven prices to all time highs.