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EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS
Definition:
Halons are a group of brominated organic compounds used as fire retardants. The
transport of these compounds to the stratosphere, followed by their photolysis
to release Br (Bromine) atoms, gives this group a very high ozone depletion
potential. The production of these compounds is now banned according to the
Montreal Protocol.


Halogens are made up of the elements fluorine (F), chlorine (Cl), bromine (Br),
iodine (I), and astatine (At). The first four members are present in trace
amounts in the atmosphere as a result of both natural and anthropogenic
activity.

Reference:
American Meteorological Society. 2000. Glossary of Meteorology, Second Edition.
Boston, MA: American Meteorological Society
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