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Chloroflourocarbons
Beginning of essay
were discovered in the 1920's by Thomas Midgley, an
organic chemist at General Motors Corporation. He was looking for inert, non-
toxic, non-flammable compounds with low boiling points that could be used as
refrigerants. He found what he was looking for in the form of two compounds:
dichlorodifl ....
Middle of essay
.... were sold in America.
The hopes of a seemingly perfect refrigerant were diminished in the late
1960's when scientists studied the decomposition of CFCs in the atmosphere.
What they found was startling. Chlorine atoms are released as the CFCs
decompose, thus destroying the Ozone (O3) atoms in the high stratosphere. It
became clear that human usage of CF2Cl2 and CFCl3, and similar chemicals were
causing a negative impact on the chemistry of the high altitude air.
When CFCs and other ozone.... |
| Number of words: 1178 |
Approximate pages: 5 |
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