Food Preservation

food science · history · sustainability · survival

Cold slows growth. Refrigerators and freezers work because cold temperatures make bacteria and mold grow much slower, letting food stay fresh for weeks or months instead of days.

Salt stops spoilage. Salt pulls water out of food and creates an environment where harmful microorganisms cannot survive, which is why salt-cured meats and fish can last for years.

Sugar preserves naturally. High amounts of sugar in jams, honey, and candies make it impossible for mold and bacteria to grow because they cannot thrive in such sweet, dry conditions.

Sealing keeps air out. When you seal food in airtight jars or cans, you prevent oxygen from reaching it and stop new bacteria from getting inside, allowing pickles and preserved vegetables to last much longer.

Less waste matters. By preserving food well, we throw away much less food, which means we use fewer resources to grow new food and help protect the environment.