CA (Controlled-Atmosphere) freshness cold rooms represent the most advanced method for preserving the freshness of fruits and vegetables. Building on refrigeration technology, these rooms modify the gas composition by precisely controlling temperature, humidity, CO₂, O₂, and ethylene levels. This environment slows the respiration and metabolic processes of the produce, effectively maintaining freshness and significantly extending both storage and shelf life. Fruits and vegetables stored in CA freshness cold rooms enter a dormant state and “wake up” after removal, resulting in an extended shelf life of 21–28 days—4 to 5 times longer than that of ordinary cold rooms.