People should especially avoid going outside during 10 am and 4 pm, as thats when the UV rays are the strongest. (Nunas, 8) The ozone layer is depleting due to chlorofluorocarbons, a man made chemical that has other replacements. Due to this depletion, toxic ultraviolet radiation is entering the earth's stratosphere from the sun. UV rays are destroying our plants and the aquatic food chain, as well harming ourselves. UV radiation causes people to be at a higher risk of skin cancer, including malignant melanoma.
Ozone located approximately 10-25 miles above the Earth’s surface, in a part of the Earth’s atmosphere called the stratosphere is very beneficial. The ozone is a major factor that makes life possible on Earth. About 90% of the planet’s ozone is in the ozone layer. Ozone in this layer shields and filters out the Earth from 95-99 percent the sun’s ultraviolet radiation. A low level of ozone does not protect or prevent the sun’s ultraviolet rays from reaching the surface of the Earth, therefore, overexposing life on Earth causing many diseases.
Its chemical formula is O3. It is formed when a molecule of oxygen is hit by ultraviolet radiation (UV), which disassociates the oxygen molecule into separate atoms. These atoms then combine with another molecule of oxygen making ozone. (Kunstmaan 1) Ozone is vitally important to the atmosphere and therefore, to us people down on earth’s surface. But we are depleting the amount of it that we still have with chlorofluorocarbons and other harmful gases.
Ozone Depletion Atmospheric ozone layer depletion is a serious problem currently facing the world. The ozone layer protects humans, animals, and plants from harmful ultraviolet rays. Money and time are being spent on ozone repair, but the problem still exists. The ozone layer is a region of the stratosphere containing ozone, or O3 gas. The ozone layer is essential to both plant and animal life on earth because it protects the surface from dangerous ultraviolet light.
The ozone layer is a key component to all life on earth. The ozone layer is up in the stratosphere protecting us from the harmful UV rays emitted by the sun. Without the ozone layer, detrimental effects can range from premature aging in the skin to multiple types of skin cancer. In this project, I will be discussing ozone depletion. I will be talking about ozone depletion causes, changes, effects, and the future of ozone depletion.
The ozone’s essential duty is to protect society from harmful ultraviolet rays by acting as a filter. The ozone is a layer in the middle of the stratosphere that protects the earth from the harmful ultraviolet radiation emitted by the sun. The ozone layer acts as a shield and prevents the sun’s deadly ultraviolet rays from penetrating to the surface of the earth. The ozone layer protects humans in ways that are difficult to predict The main reason that the ozone is depleting is because of the very nature of human activity. The ozone is being destroyed by chlorofluorocarbons.
Our Radiant Planet: Depletion of the Ozone Layer Ozone is a relatively unstable form of molecular oxygen containing three oxygen atoms produced when upper-atmosphere oxygen molecules are split by ultra violet light. Stratospheric ozone is found in a broad band, extending generally from 15 to 35km above the earth. Although the ozone layer is surprisingly thin, it acts as a protective shield to the earth, as it filters out most of the harmful solar ultraviolet radiation (in particular UV-B) that would otherwise reach our planets surface. Humans have damaged the ozone layer by adding molecules containing chlorine and/or bromine that lead to ozone destruction. The largest group among these are chloroflurocarbons (CFC's).
Ozone, however, is very rare even in the ozone layer. Oxygen makes up approximately twenty percent of air and ozone makes up only 3 x 10-5 percent of air. Furthermore, this minuscule amount of ozone is enough to protect the earth from most ultraviolet light. Ozone prevents most UV-B radiation from reaching the surface of the earth (Environment Canada, 1996). Ozone is very important to life on earth because the harmfulness of high-energy UV-B radiation stems from the high energy of these light rays, enabling them to penetrate deeply into water, plant tissue and epidermal tissue of animals.
Human exposure to UV-B rays increases the risk of skin cancer, a weakened immune system, and cataracts. Additionally, UV-B exposure can also damage single cell organisms, terrestrial plant life, and aquatic ecosystems. UV-C has a short wave length of 280 to 100 nanometers and is completely absorbed by the ozone layer and the atmosphere. UV-C has a variety of positive uses, but the most unique is that it contributes to food, air, and water purification. For the billion years that the Earth has been here, ozone molecules in the atmosphere have protected life on Earth from the effects of ultraviolet rays that the Sun produces.
Although ozone makes up less that 1ppm of all the gases in our planet's atmosphere, but it is essential to life on earth. Scientists assume... ... middle of paper ... ...in halons - buy the type filled with a more environmentally safe chemical. If you could join with millions of people across the nation in conservation efforts designed to protect the environment from atmospheric pollutants, fossil fuel consumption - and the release of hazardous chemical substances would certainly decrease. Whatever each of us can do to protect our global commons, it seems crucial to begin those efforts now, to use a much quoted phrase:" We are all in this together." All of us need to work in our own particular ways to be caretaker of the earth.