This will give you substantial information about the causes and effects of the ozone layer depletion including the preventive measures for it.
The National Aeronautics and Space Administration (NASA) scientists had discovered that a massive hole in the ozone layer in our mother Earth was already at alarming rate. NASA satellites have found the size of the ozone hole was already at 9.8 million square miles over Antarctica as of September 15, 1999.
British researchers revealed the ozone hole over the South Pole has reappeared every Antarctic spring, growing bigger and deeper, since they published measurements about it in 1985. According to the authorities, half of the ozone layer vanished for several months in 1987. It was in the 1970s when NASA scientists discovered a massive hole in the earth’s layer of ozone above Antarctica.
What is ozone? Ozone is a form of oxygen. It is a gas which forms a protective layer on earth by absorbing much of the ultraviolet rays from the sun. It is also essential to life for it has ability to screen damages of ultraviolet light from reaching the surface of the earth. The exposure to ultraviolet radiation will be greater and may affect one’s health if there is a hole in the sky. It is a term for the concentration of ozone in the stratosphere, which serves as an efficient screen from the damaging ultraviolet (UV) radiation from the sun. Ultraviolet rays also known as UV rays are invisible rays as light energy being released by the sun.
Reports revealed scientists currently resolve that the main cause of the Antarctic zone hole is the buildup of man-made chlorine and bromine compounds, most remarkably are the chlorofluorocarbons (CFCs) and halons.
What are chlorofluorocarbons? These are chemicals composed of fluoride, chlorine and carbons. These have been extensively used in industry for decades because of its stability, non-flammability and low toxicity. Chlorofluorocarbons and halons are used as aerosol repellants, cooling agents in refrigerators and air conditions and detergents for electronic parts. (CFCs are also used in fire extinguishers, in making styrofoams, plastic foams, hair sprays and others.
The CFCs float in the atmosphere where the ozone layer is located. More ultraviolet light penetrate into the earth upon the ozone layer breakdown, when the harmless CFCs are released into the atmosphere. The chlorine in CFCs reacts with the ozone to form ordinary oxygen, which reduces the effectiveness of the layer. CFCs are among the most prevalent and widely scattered air pollutants. Once there is a hole in the sky, the exposure to ultraviolet radiation will be greater and may affect to everybody’s health.