Ozone Layer Depletion

http://weather.about.com/od/climatechange/a/ozonecfc.htm
Ozone depletion is a crucial environmental problem on Earth. The growing concern over CFC production and the hole in the ozone layer is causing alarm among scientists and citizens. A battle has ensued to protect Earth's ozone layer.
In the war to save the ozone layer, and you may be at risk. The enemy is far, far away. 93 million miles away to be exact. It is the sun. Each day the Sun is a vicious warrior constantly bombarding and attacking our earth with harmful Ultra Violet radiation (UV). Earth has a shield to protect against this constant bombardment of harmful UV radiation. It is the ozone layer.


Ozone Destruction is Not All Bad. Ozone is supposed to break up in the atmosphere. The reactions taking place high in our atmosphere are a part of a complex cycle. Here, another video clip shows a close-up view of ozone molecules absorbing solar radiation. Notice the incoming radiation breaks apart ozone molecules to form O₂. These O₂ molecules are later rejoined to form ozone again. (29 seconds, MPEG-1, 3 MB)