Ozone is a special type of Oxygen molecule which has 3 oxygen atoms instead of 2. Electrical sparks and ultraviolet light can cause ordinary oxygen to form ozone. The presence of ozone sometimes causes a detectable odor near electrical outlets. Oxygen O2 turns into Ozone O3 during thunderstorms. This Ozone accumulates 15 to 35 kilometers (9.3 to 21.7 mile) above Earth, although its thickness varies seasonally and geographically.Ozone Layer is a layer of the atmosphere which protects us from harmful Ultra Violet Rays.
The ozone layer absorbs 97 to 99 percent of the Sun’s medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface. If all the ultraviolet radiation given off by the Sun were allowed to reach the surface of Earth, most of the life on Earth’s surface would probably be destroyed. Short wavelengths of ultraviolet radiation, such as UV-A, B, and C, are damaging to the cell structure of living organisms. Fortunately, the ozone layer absorbs almost all of the short-wavelength ultraviolet radiation and much of the long-wavelength ultraviolet radiation given off by the Sun.
In 1976 atmospheric research revealed that the ozone layer was being depleted by chemicals released by industry, mainly chlorofluorocarbons (CFCs). Concerns that increased UV radiation due to ozone depletion threatened life on Earth, including increased skin cancer in humans and other ecological problems, led to bans on the chemicals, and the latest evidence is that ozone depletion has slowed. The United Nations General Assembly has designated September 16 as the International Day for the Preservation of the Ozone Layer.
In order to prevent depletion of Ozone layer we have to reduce the use of products which use CFC. Refrigerators, Air-Conditioners and Spray cans produce CFC. We can open windows or switch on fans instead of using air conditioners. We can eat freshly prepared food instead of frozen food which is not only good for the environment but also good for our health. We should use powers, deodorants or lotions instead of body sprays.
Depletion of Ozone is a threat to our survival as it not only causes health hazards but also decreases agricultural yields. If the depletion of ozone layer continues many people would lose their lives due to cancer, tumor or other diseases; a global food shortage can occur very soon. So this problem should not be taken lightly. We hope our readers will try to avoid using CFC products to help us create a better tomorrow.