Mark quoted:
They got to get rid of the brass becasue someone is afraid it will cause cancer....
This is a very good site:
http://www.cancersupportivecare.com/toxin.html
I would encourage everyone to read through it, since, dealing with Cancer is the hardest thing you will ever do; and some of what you will find in this site is pretty informative, and knowledge is essential in helping to live well and live long.
Nickel and Nickel compounds: found in steel, dental filings, copper and brass, permanent magnets, storage batteries, and glazes. Both are associated with several types of cancers in research on animals. Human exposures are linked with nasal cavity, lung, and possibly larynx cancers.
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Here is another link worth reading also, especially, since it is on topic here:
http://www.cancer.org/docroot/PED/content/PED_1_3X_Lead.asp?sitearea=PED
Does Lead Cause Cancer?
There is some evidence showing that lead may cause cancer, but this evidence is weak. Still, lead has been loosely linked with cancers of the lung and stomach, and more weakly linked to brain and kidney cancers.
Occupations With Exposure To Lead
Metal Workers Demolition Workers Lead Burners Firing Range Personnel Metal Grinders Foundry Workers
Pipe Cutters Gas Station Worker sScrap Metal Workers Glass Blowers/Stained Glassmakers Solderers/WeldersGun Makers Battery Makers Jewelers Bridge DeleadersPainters/Pigment Makers Cable Makers/Splicers Plumbers Ceramics Workers Radiator Repair Workers Brass and Bronze Workers Smelters