It’s funny how cold has come to be associated with clean. Examples?
1. Refrigerated storage of foods. Whether frozen or just chilled these are sterile environments where the food won’t decay.
2. Clean rooms. These are most commonly associated with the medical world. But they also appear in many other sectors. Think of spray painting and how you won’t want any dust being mixed in with the paint.
3. Think about the antarctic and glaciers. Miles and miles or whiteness with little or no colour. This is a sterile world.
Image credit Frimatec uk