"dakotashooter", I'm in agreement with the natural sources idea, and their natural range is in the smoggy areas. There are numerous areas of concentration of heavy metals (mercury, lead, selenium etc.), some of which are, or have been, mined. Abandoned lead and mercury mines are in almost every area of geothermal activity. The incidence of naturally occurring heavy metal poisoning is more feasible to me than that of lead bullets. I'm willing to agree to anything that will protect a species from going extinct, however, I need to see more scientific proof of the cause than the emotional stuff that we have now. We have been putting bandaids on the large wounds that "we" created for too long now, it's time to look for the real cause.
"smokinjoe5150", those superlite rigs were after my time. We were still in the Mk 5 and the Jack Brown!