I answered my own question. A google search found many sources of
information on mercury pollution. One listing the top five sources is at:
http://www.rodalewellness.com/health/mercury-pollution-and-exposure
As I thought coal burning power plants account for the largest share. I
found some sites with articles about mercury batteries:
http://www.frost.com/sublib/display-market-insight-top.do?id=20759887
Also, this has some statistics on sources.
http://www.env-health.org/IMG/pdf/mercury_chapter2.pdf
It would appear that if a workable recycling program was in
existence mercury batteries could be used without contributing to
pollution. Such a program might be possible in industry but I think most
individuals would just not bother.
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
