"The ozone layer." What really is the ozone layer, and what does it do? Is it just a plastic covering over the earth? Why do we depend on the ozone layer so much for the earth's survival? Without the ozone layer there would not be life on this earth. It protects us from all the bad UV ray from the sun, so we do not get skin cancer and die. It also keeps in the heat so we would not freeze to death. Also it lets in the sunlight heat in. That is why the ozone layer is so important. How can we protect the ozone layer for future generations?

"The ozone layer starts about 12 mi. above the earth's surface and ends about 30 mi. above the surface. The ozone layer is formed by the action of sunlight on oxygen. It forms when O2 is broken into two atoms. The atoms then attach themselves onto oxygen molecules to form the ozone layer. The ozone layer is critical to life because it blocks out harmful ultraviolet rays. In the ozone there is natural nitrogen compounds being released into the atmosphere, while the nitrogen compounds are being held in, it is causing a threat to humans and the environment. Also when chlorofluorocarbons (CFC's) are released they are broken down by sunl

ight causing the chlorine to break down the ozone molecules." ( Funk, pg. 1)

"Scientists have been discovering different CFC's, which have been reducing the ozone layer. Some specific CFC's are things like aerosol cans, and also what is used in some refrigerants. For this reason CFC's have been removed from aerosol cans." (Houston Environmental Foresight (HEF) pg. 1) "The first CFC to be invented was CFC-12 by Thomas Midgely, a General Motors Chemist in 1930. This CFC was used in most refrigerators by 1945. Then in the 1960's air conditioners using CFC proliferate in homes then cars, which accounted for more CFC's than all other uses combined." (Fisher, pg. 74 ) "Other chemicals, such as bromine halocarbons and nitrous oxides from fertilizers, have also been attacking the ozone layer. For several years, beginning in the late 1970's, research scientists working in Antarctica detected a periodic loss of ozone in the atmosphere high above the Antarctica. The "hole" in the Antarctic spring and continues for several months before closing up again. In 1987, a treaty for the protection of the ozone layer was signed, and later 36 more nations joined, including the US. Then during the 1990's a total ban of CFC's was applied to the world. To monitor the ozone depletion on the global level, in 1991 NASA launched a 7-ton Upper Atmosphere Research Satellite. Orbiting the earth at a speed of 600 km, this satellite measured ozone var

Some common words found in the essay are:
Satellite Orbiting, Caused CFC's, Motors Chemist, ozone layer, Foresight HEF, Layer Thinning, John Crawley, climate change, pg 1, Wagnalls Corp, sea level, skin cancer, hef pg, carbon dioxide, Ozone Layer, Funk Wagnalls, funk pg 1, funk pg, nitrogen compounds, protect ozone, layer ozone layer, sea level rising, hef pg 1, ozone layer ozone,
Approximate Word count = 972
Approximate Pages = 4 (250 words per page double spaced)