Answer:-
The invention that most revolutionized the meat industry was the refrigerated railcar. Before this innovation, meat had to be processed near where it was consumed, limiting distribution and increasing spoilage. Introduced in the 1870s, refrigerated railcars allowed meat to be transported over long distances without spoiling, helping companies like Swift and Armour expand nationwide. This not only transformed how meat was distributed but also centralized processing in major cities, improving efficiency and reducing costs. It marked the beginning of the modern meatpacking industry and played a key role in shaping America's food system as we know it today.
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