The reason that Halon is, shall we say, under fire, is that it is has that
big bad no-no Fluorine in it... which is a the "F" in "CFC's"   Fluorine
is also the key behind Teflon... Fluorine by itself is a nasty element and
will quickly kill us, and in the air it will interfer with Ozone
synthesis.

Fluorine for everybody!
-Matthew

Matthew Pollard             http://www.uidaho.edu/~poll7356
Dept. of Chemistry               http://www.chem.uidaho.edu
University of Idaho                   http://www.uidaho.edu