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The term ozone depletion is used to describe two distinct but related observations: a slow, steady decline, of about 3% per decade, in the total amount of ozone in the earth's stratosphere during the past twenty years and a much larger, but seasonal, decrease in stratospheric ozone over the earth's polar regions during the same period. (The latter phenomenon is commonly referred to as the "ozone hole".) The detailed mechanism by which the polar ozone holes form is different from that for the mid-latitude thinning, but the proximate cause of both trends is believed to be catalytic destruction of ozone by atomic chlorine and bromine. The primary source of these halogen atoms in the stratosphere is photodissociation of Chlorofluorocarbon (CFC) compounds, commonly called freons, and bromofluorocarbon compounds known as Halons, which are transported into the stratosphere after being emitted at the surface. Both ozone depletion mechanisms strengthened as emissions of CFCs and Halons increased. CFCs, Halons and other contributary substances are commonly referred to as "ODS", or "Ozone Depleting Substances." Since the ozone layer prevents most harmful UVB wavelengths (270–315 nm) of ultraviolet light from passing through the Earth's atmosphere, observed and projected decreases in ozone have generated worldwide concern leading to adoption of the Montreal Protocol banning the production of CFCs and halons as well as related ozone depleting chemicals such as carbon tetrachloride and trichloroethane (also known as methyl chloroform). It is suspected that a variety of biological consequences, including, for example, increases skin cancer, damage to plants, and reduction of plankton populations in the ocean's photic zone, may result from the increased UV exposure due to ozone depletion.

Air is a mixer of many gases and ozone is O3(3 is in sub-script) and the rate of depletion is more than the rate of make-up , so there are many holes.

2006-10-28 09:17:38 · answer #1 · answered by Anonymous · 0 0

Ozone is formed in the upper atmosphere by the action of light on free oxygen, allowing to combine three atoms of oxygen into O3 rather than the normal O2. If there is something in the atmosphere that absorbs this energy more easily than oxygen, the formation of O3 is decreased or eliminated. So, the air is still there, but there is something other than oxygen absorbing the light energy, so ozone is decreased. Until that substance is removed the hole will continue to be there, and more will form as additional regions with the absorbing substance are created. One of the substances that decrease the formation of ozone is the refrigerant known as Freon, but I'm certain there are others.

2006-10-26 10:52:15 · answer #2 · answered by David A 5 · 0 0

there are not alot of holes in the ozone. there are two areas that have annual thinning. the north and south poles. it does not take alot of time to create ozone, it is created by sunlight degrading oxygen molecules. since O1 cannot exist, each broken O2 molecule becomes two O3 molecules. at night, the O3 molecules slowly seperate to their natural O2 state. at the poles, there is six straight months of no sunlight, so at the end of that six month period, most of the O3 has degraded, and no new O3 has been created because there has been no sunlight. then the pole get six months of straight sunlight, and all the O3 is restored. During years of heavy summer storms, the sunlight time gets shortened, and less ozone is created.

2006-10-26 11:35:33 · answer #3 · answered by iberius 4 · 0 0

Air does not escape through these holes. The solar radiation just gets in a lot easier, and then gets trapped when it is reflected off the earth's surface and then bounces off the ozone layer.

2006-10-26 10:47:01 · answer #4 · answered by sangheilizim 4 · 0 1

Hi there,

Air is renewable
not ozone gas.

Due to reaction between pollution gases and ozone layer, makes it depleted. But makes other form of air. Thus AIR IS RENEWABLE.

For more information
you can contact me at:

sanchitmittal2005@yahoo.com



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2006-10-26 12:10:26 · answer #5 · answered by Sanchit Mittal 2 · 0 1

because Ozone is O3, not O2 that we breathe. It takes nature a while to manufacture O3.

2006-10-26 10:51:46 · answer #6 · answered by Jon C 6 · 0 1

o3 and o2 are two different gasses, o3 ozone is not renewable

2006-10-26 10:52:04 · answer #7 · answered by frediks10 3 · 0 1

we polluted it with all our might
and saw it to its damage

2006-10-26 11:32:10 · answer #8 · answered by R Purushotham Rao 4 · 0 1

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