The Ozone Layer

The ozone produced by the sun light protect and maintain the life in the planet earth because it absorbed and is like a shield that protect the living things from the dangerous ultraviolet radiation produced by the sun. So the scientific get worried when they discover that some products called CFC´s (make of fluor) used in aerosols, can represent a significative damage to the ozone layer, this chemicals react in certain way with the sun, so when they are in the atmosphere this special reaction is corrosive to the ozone layer and can open holes in this, in which the UV rays would pass directly to the planet.
The first hole discover in 1970 was over the Antarctica and it was almost 28 million square kilometers big, and after that the Scientifics started putting special attention to this problem.
Actually there similar holes over the Arctic, Scandinavia and North America, The Max Planck (Germany) institute affirms that if this continues in 30 or 40 years the ozone layer would disappear completely. The European Union, world-wide organizations and the NASA are proving an especial care to the ozone layer; they say that in 2050 the ozone layer would be totally recuperated.