Chloroflourocarbons

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so CFCs
were created because they could be kept in liquid form and in an only slightly
pressurized can. Thus, in 1947, the spray can was born, selling millions of
cans each year. Insecticides were only the first application for CFC spray cans.
They soon employed a number of products from deodorant to hair spray. In 1954,
188 million cans were sold in the U.S. alone, and four years later, the number
jumped to 500 million. CFC filled cans were so popular that, by 1968, 2.3
billion spray cans 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 ...

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