Monday, September 27, 2010
The hole in the ozone layer
All people know about the hole in the ozone layer.The hole was discovered in 1970 by scientists.Scientists discovered what caused the problem. There were some gases in some products. These are called CFCs. CFCs are produced by old fridges, air conditioners and spray cans. Today there aren't CFCs anymore.
The ozone layer is between about 15 and 30 kilometres above the ground. The ozone layer prevents ultraviolet rays from featcing the sun. These rays are very dangerous for the eyes and skin, so we can understand how important the ozone layer is to the people.
Posted by antonis8