How are Chlorofluorocarbons dangerous?
Chlorofluorocarbons, or CFC's, get into the upper atmosphere and wreak havoc with the ozone later. High in our atmosphere, oxygen (O2) gets bombarded by solar radiation to produce ozone (O3). This is fine, because ozone has the unique property of being able to block a lot of this harmful solar radiation from reaching the earth's surface, where it would cause crop failure and famine. When CFC's get up there, the solar radiation breaks the chlorine away from the CFC. The chlorine acts as a catalyst, speeding up the conversion of ozone back into diatomic oxygen (O2). You don't want this, because O2 doesn't block solar radiation like O3 can. This results in much more solar radiation reaching the surface, which is bad! Incidentally, this effect was first observed on the planet Venus. It occured to astronomers that it might actually be happening here too, so we took a close look, and sure enough it was. Yet another life-saving benefit of our space program!
Why was the refrigerator and freezer industry pressured to find an alternative coolant to chlorofluorocarbons?
CFCs (chlorofluorocarbons) are not natural gases. They are completely made by man. Because they contain chlorine and bromine they began to destroy the ozone layer before they were banned. HCFCs were then used as a temporary measure as they were not so dangerous, but they are now being phased out in favour of HFCs, which do no damage to ozone.
Chlorofluorocarbons (cfc) are a type of halogenated hydrocarbon in which both clorine and fluorine atoms replace some of the hydrogen atoms. CFSs have brought about thinning of the Earth's ozone shield, which protects terrestial life from dangerous effects of ultraviolet radiation. More cases of skin cancer are expected to occur due to depletion of ozon layer. Answer is Chlorofluorocarbons.
For years people thought chlorofluorocarbons were harmless. Then someone discovered they destroyed the ozone in the ozone layer. The ozone layer stops the most dangerous of the sun's rays. Those rays cause cancer when they strike an individual. The continued use of chlorofluorocarbons would wipe out life on earth that lives above the ground or above sea level from cancer. As a result, it became illegal to make machinery that used them. When machines that…