What substances are CFC, HFC or asbestos, and what is the harm to humans?
By asbestos fiber bundles, and fiber bundles by a long and thin can separate fiber asbestos. With high flame resistance, electrical insulation and thermal insulation, fire prevention is important insulation and insulation materials.Asbestos itself is not toxic, it's the greatest harm from the fiber, which is a very small, almost invisible to the naked eye fiber, when these tiny fibers are inhaled, will be attached and deposition in the lungs, causing lung disease, asbestos has been the International Cancer Research Center for certain carcinogens.
Freon is the culprit of ozone layer destruction. It was synthesized in 1920s. Its chemical property is stable, and it is not flammable and toxicAsbestos is also called "asbestos" for commercial terms, which has high tensile strength, high flexibility, chemical and thermal erosion resistance, electrical insulation and with silicate mineral products spinnability. It is a combination of natural fibrous silicate minerals. Under the jurisdiction of the 2 class a total of 6 kinds of minerals (a serpentine asbestos, amphibole asbestos, asbestos, actinolite anthophyllite tremolite asbestos asbestos, iron, etc.).
In accordance with the Freon refrigerant damage to the ozone layer can be divided into three categories: one is the chlorine fluorine hydrocarbon products, referred to as CFC (the destruction of the ozone layer; two is the maximum) of hydrogen and chlorine fluorine hydrocarbon products, referred to as HCFC (a great damage to the ozone layer); three is the hydrogen fluorine hydrocarbon, referred to as HFC, its molecule containing hydrogen, fluorine, chlorine, chlorine is no halogenated hydrocarbon, so causing damage to the ozone layer will not, namely ODP (Ozone Depletion Potential) value is zero.
