Yes, frozen water can be used to slow down the decompostion process of many organic materials such as meat, vegetables and even beverages.
The most commonly use natural refrigerants are ammonia, carbon dioxide and hydrocarbons, and air and water are also included in the “friendly five”. They are important solutions to the conventional fluorocarbons because they have no impact on the ozone layer, neglible or no contribution to global warming, and are capable of being used in more energy efficient equipment and systems. There is a lot of information available on the net about these. Natural refrigerants are strongly opposed by manufacturers of fluorochemicals.
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