Chlorofluorocarbons (CFCs) are a group of chemical compounds that has been shown to have caused the ozone holes in the stratosphere over both the North and South poles. A seasonal hole appears above Antarctica in September.
These holes in the atmosphere allow the suns rays to enter the earth without a protective layer to shield us, which may cause an increase in skin cancer.
CFCs are an aggregation of chemical compounds that include alkanes and haloalkanes. These chemicals are used in aerosol spray cans, refrigerants, foam blowing (to make packing foam and foam cups), fire extinguishers and solvents to clean electronic equipment.
The use of CFCs began in the 1920, when carbon tetrachloride was used in fire extinguishers, until the end of World War II. In 1928, Thomas Midgley developed CFCs as a replacement for a mixture of ammonia, chloromethane and sulfur dioxide that was commonly used as a refrigerant.
The CFC was superior to the former compounds because it was non-toxic, had a low boiling point and was generally non-reactive.
CFCs continued to be used, mostly by the military and in firefighting, until 1974 after the journal, Nature by...
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