WRONG.
Contrary to the environmentalists' claims, there is no permanent hole in the ozone layer and no ozone shortage. Ozone is constantly created and destroyed. The interaction of ultraviolet radiation with oxygen molecules is what produces ozone. In the stratosphere, 10 to 40 kilometers above the earth's surface, several tons of ozone are produced every second.
The amount of ozone present at any one time is influenced by many factors. For example, the amount of ultraviolet radiation reaching the stratosphere (and ultimately producing ozone) depends upon latitude, solar cycle, and season. Concentrations of ozone may differ drastically from one day to the next, sometimes by as much as 50 percent, depending on the weather. Ozone holes are natural reactions to these ultraviolet light variations. Ozone levels can also be affected by the amount of volcanic matter in the stratosphere. Each volcanic eruption emits roughly a thousand times the amount of ozone锟絛epleting chemicals than all the CFCs man has ever produced.
The ozone hole that appeared over Antarctica and caused all the panic is a natural and annual phenomena. The annual ozone hole was first measured in 1956锟?7, long before the ozone锟絛estroying CFCs were in common use. The hole appears at the end of the dark, cold Antarctic winter, lasts about three to five weeks, and then disappears. There is no overall or permanent depletion of the ozone layer.
No comments:
Post a Comment