The fan can change the environment temperature without environment pollution caused by chemicalcooling agent.
没有化学制冷剂对环境的污染；
2
Mainly used for human consumption such as freeze drinks, mix wines, coolfoodstuffs. and also used for chemicalcooling, food processing, fisheries, poultry-processing, meat plants etc.
Researchers have long known that greenhouse gases might help the layer recover by cooling the stratosphere, which slows the rates of chemical reactions that destroy ozone.