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Frozen foods are frozen using a variety of mechanical, chemical, and electrical methods to preserve food for future use and consumption. Freezing food has been used as a method of food preservation for centuries, but it was not until the 20th century, with the development of refrigeration units and freezers, that freezing food for commercial and domestic use was possible. This entry focuses on the origins of frozen food as a means of preserving food for future consumption and its effects on the way in which people consume food worldwide.

Early Methods of Freezing Food

Prior to the development of the modern freezer, food was frozen for preservation using a variety of different methods: Underground ice pits and aboveground ice houses were constructed to conserve snow ...

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