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Canning can be a safe and economical way to preserve quality food at home. Home preserved foods can provide a variety of nutritious food for your family all year long.
How Canning Preserves Foods
The high water content of most fresh foods makes them very perishable. Foods spoil or lose their quality for several reasons:
growth of undesirable microorganisms - bacteria,molds, and yeasts
activity of food enzymes
reactions with oxygen