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Most of us rarely think about how our food appears on supermarket shelves, but that all changed with Covid-19. Travel restrictions and labour absences led to the shortage of some foodstuffs across the world. Suddenly, we were all forced to sit up and take notice of where our food comes from and how it reaches our plates.

So how does our food supply chain work? How has it developed into today's sophisticated international system? How is new technology transforming the journey from farm to fork? And might the current crisis lead us to reset the food chain in a new and better way? Scientist James Wong presents this special programme.