POST WWII, BIG CHANGES IN FOOD SYSTEM (II). “Geographic specialization of the food system followed improvements in U.S. highways, particularly with the interstate highway system. Rail shipments of perishable foodstuffs had been slow, costly, and inconvenient for most food retailers. With better highways, California and Florida quickly became major centers of agricultural production and Americans no longer needed to eat in season, or even to preserve foods for off-season use.” ”
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