Every day, a precarious relay race takes place to deliver the fresh food on our tables. From the moment a head of lettuce is cut or a salmon is fileted, it enters a delicate life-support system known as the cold chain: a synchronized network of refrigerated trucks, warehouses, and display cases designed to keep food within a narrow, safe temperature range. When this chain holds, we enjoy crisp produce and safe meals. When a single link fails, the consequences are far more severe than a spoiled dinner. Breaches in the cold chain are a leading, yet often invisible, contributor to a massive global crisis of food waste and a genuine public health threat, driving foodborne illness and imposing staggering economic costs.

The challenge of maintaining an unbroken chill from farm to consumer is on

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