By: Tori, Alyssa & Jessica. Ozone Depletion . What is Ozone? .
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Ozone is destroyed when it reacts with molecules containing nitrogen, hydrogen, chlorine, or bromine. Some of the molecules that destroy ozone occur naturally, but people have created others.
Solar ultraviolet radiation is largely absorbed by the ozone in the atmosphere—especially the harmful, high-energy UV-a and UV-b. The graph shows the flux (amount of energy flowing through an area) of solar ultraviolet radiation at the top of the atmosphere (top line) and at the Earth’s surface (lower line). The flux is shown on a logarithmic scale, so each tick mark on the y-axis indicates 10 times more energy. Without the ozone protecting us from these rays, it would be very difficult for anything on earth to survive.
After a while, people began to realize that once this chemical enters the stratosphere, the chlorine atom is removed and attracts one of the three oxygen atoms found in the ozone molecule
Sources of these chemicals include refrigerators, home insulation, aerosol spray propellants, plastic foam, old air conditioners and food containers.
Antarctica is the first known case of ozone depletion. Scientists found a large hole in the ozone right above this continent. Antarctica is now threatened by the many melting icecaps, due to the increase in UV radiation.