They come in different formulas, but, the culprit in this greenhouse gas is sunlight and fluorine.
Fluorine has an atomic number 9 on the Periodic Chart of Chemicals. It has five electrons in it's outer shell and is highly reactive. Fluorine has the highest electronegativity of all the elements.
Fluorine (click here) is the most reactive of all elements and no chemical substance is capable of freeing fluorine from any of its compounds. For this reason, fluorine does not occur free in nature and was extremely difficult for scientists to isolate. The first recorded use of a fluorine compound dates to around 1670 to a set of instructions for etching glass that called for Bohemian emerald (CaF2). Chemists attempted to identify the material that was capable of etching glass and George Gore was able to produce a small amount of fluorine through an electrolytic process in 1869....
