Notes about data:
These data are from the United Nations Environmental Program (UNEP)
Report: "Production and Consumption of Ozone Depleting Substances
1986 - 1998" which can be found at http://www.unep.org/ozone/.
Information from the US EPA website: http://www.epa.gov/ozone/
Chlorofluorocarbon (CFC): a compound consisting of chlorine, fluorine,
and carbon. CFCs are very stable in the troposphere. They are broken
down by strong ultraviolet light in the stratosphere and release chlorine
atoms that then deplete the ozone layer. CFCs are commonly used as
refrigerants, solvents, and foam blowing agents. The most common CFCs
are CFC-11, CFC-12, CFC-113, CFC-114, and CFC-11, which constitute
Group I . The ozone depletion potential (ODP) for each CFC is, respectively,
1, 1, 0.8, 1, and 0.6.