That article does NOT say that half the mercury was anthropogenic before the industrial revolution. It makes no comment about the amounts present. And, of course, it certainly doesn't support Paddy's (BriPat1234) assertion that 95% is from black smokers.
Doesn't matter WHERE it came from to me.
Huh???
And so you agree that coal plants are responsible for a large portion of the environment's current mercury load and that coal and other mercury sources were used less 'responsibly' in the past than today.
Which brings me to the next point.... Requoted from the medical source I gave at the top of this page..
The primary source of environmental exposure to mercury in the general population is through the consumption of contaminated fish.[46] Fish consumption has clear health benefits, and the risk posed by mercury exposure is currently speculative.
WHY is it speculative? Because there are NOT a lot of epidemiological studies of blood Mercury vs symptoms.. ESPECIALLY NOT in the USA.. Go help me look --- but they don't seem to exist.. And the studies that the EPA and CDC base their "guidelines" on come from only 2 or 4 studies done in parts of the world with particular mercury pollution problems..
When was last time we rushed off to solve an enviro problem without an accurate quantization of harm??
Go find me human blood levels in the USA population that EXCEED clinical significance..
I'll take any evidence you come up with...
Below is the reference section for Wikipedia's article on mercury poisoning. I think you will find a great deal more than 2-4 studies have been performed on the topic. By my count this list contains more than 50 studies on mercury poisoning published in refereed technical journals.
References
^ Jump up to: a b c d e f g h Clifton JC 2nd (2007). "Mercury exposure and public health". Pediatr Clin North Am 54 (2): 237–69, viii. doi:10.1016/j.pcl.2007.02.005. PMID 17448359.
^ Jump up to: a b c d Bjørklund G (1995). "Mercury and Acrodynia". Journal of Orthomolecular Medicine 10 (3 & 4): 145–146.
^ Jump up to: a b Davidson PW, Myers GJ, Weiss B (2004). "Mercury exposure and child development outcomes". Pediatrics 113 (4 Suppl): 1023–9. doi:10.1542/peds.113.4.S1.1023. PMID 15060195.
Jump up ^ Horowitz Y, Greenberg D, Ling G, Lifshitz M (2002). "Acrodynia: a case report of two siblings". Arch Dis Child 86 (6): 453. doi:10.1136/adc.86.6.453. PMC 1762992. PMID 12023189.
Jump up ^ United States Environmental Protection Agency (December 1997). Mercury Study Report to Congress (PDF) 3. Washington, D.C.: United States Environmental Protection Agency.
Jump up ^ ATSDR Mercury ToxFAQ (1999-04). "ToxFAQs: Mercury". Agency for Toxic Substances and Disease Registry. Retrieved 2007-07-25.
Jump up ^ Dufault R, LeBlanc B, Schnoll R et al. (2009). "Mercury from chlor-alkali plants: measured concentrations in food product sugar". Environ Health 8 (1): 2. doi:10.1186/1476-069X-8-2. PMC 2637263. PMID 19171026. Lay summary – Medscape Today (2009-01-27).
Jump up ^ Levy M. (1995). "Dental Amalgam: toxicological evaluation and health risk assessment". J Cdn Dent Assoc 61: 667–8, 671–4.
Jump up ^ Goldman LR, Shannon MW; American Academy of Pediatrics: Committee on Environmental Health (2001-07). "Technical report: mercury in the environment: implications for pediatricians". Pediatrics 108 (1): 197–205. doi:10.1542/peds.108.1.197. PMID 11433078. Retrieved 2007-07-25.
Jump up ^ url =
Mercury danger in dolphin meat | The Japan Times
Jump up ^ Pacyna EG, Pacyna JM, Steenhuisen F, Wilson S (2006). "Global anthropogenic mercury emission inventory for 2000". Atmos Environ 40 (22): 4048–63. doi:10.1016/j.atmosenv.2006.03.041.
Jump up ^ How mercury poisons gold miners and enters the food chain, BBC News
Jump up ^ United States Environmental Protection Agency (December 1997). Mercury Study Report to Congress (PDF) 4. Washington, D.C.: United States Environmental Protection Agency.
Jump up ^ Reeves, M.A.; Hoffman, P.R. (2009). "The human selenoproteome: recent insights into functions and regulation.". Cell Mol Life Sci. 66 (15): 2457–2478. doi:10.1007/s00018-009-0032-4. PMC 2866081. PMID 19399585.
Jump up ^ Carvalho, C.M.L.; Hashemy, S.I., Lu, J., Holmgren A. (2008). "Inhibition of the human thioredoxin system: A molecular mechanism of mercury toxicity.". Journal of Biological Chemistry. 283 (18): 11913–11923.
Jump up ^ Linster, C.L.; Van Schaftingen, E. (2007). "Vitamin C: Biosynthesis, recycling and degradation in mammals.". FEBS Journal 274 (1): 1–22. doi:10.1111/j.1742-4658.2006.05607.x. PMID 17222174.
Jump up ^ Ralston, Nicholas V.C.; Raymond, Laura J. (2010). "Dietary selenium's protective effects against methylmercury toxicity.". Toxicology 278: 112–123.
Jump up ^ Hendry WF, A'Hern FPA, Cole PJ (1993). "Was Young's syndrome caused by mercury exposure in childhood?". BMJ 307 (6919): 1579–82. doi:10.1136/bmj.307.6919.1579. PMC 1697782. PMID 8292944.
^ Jump up to: a b c Clarkson TW, Magos L (2006). "The toxicology of mercury and its chemical compounds". Crit Rev Toxicol 36 (8): 609–62. doi:10.1080/10408440600845619. PMID 16973445.
^ Jump up to: a b ATSDR. 1999. Toxicological Profile for Mercury. Atlanta, GA:Agency for Toxic Substances and Disease Registry.
http://www.atsdr.cdc.gov/toxprofiles/tp46.pdf
Jump up ^ Hursh JB, Clarkson TW, Miles E, Goldsmith LA (1989). "Percutaneous absorption of mercury vapor by man". Arch. Environ. Health 44 (2): 120–127. doi:10.1080/00039896.1989.9934385. PMID 2494955.
Jump up ^ Cherian MG, Hursh JG, Clarkson TW (1978). "Radioactive mercury distribution in biological fluids and excretion in human subjects after inhalation of mercury vapor". Archives of Environmental Health 33: 190–214.
Jump up ^ Ngim CH, Foo SC, Boey KW, and Keyaratnam J (1992). "Chronic neurobehavioral effects of elemental mercury in dentists". British Journal of Industrial Medicine 49 (11): 782–790. PMC 1039326. PMID 1463679.
Jump up ^ Liang YX, Sun RK, Chen ZQ, and Li LH (1993). "Psychological effects of low exposure to mercury vapor: Application of computer-administered neurobehavioral evaluation system". Environmental Research 60 (2): 320–327. doi:10.1006/enrs.1993.1040. PMID 8472661.
^ Jump up to: a b Langford NJ, Ferner RE (1999). "Toxicity of mercury" (PDF). Journal of Human Hypertension 13 (10): 651–6. doi:10.1038/sj.jhh.1000896. PMID 10516733. Retrieved 2007-07-31.
^ Jump up to: a b c d "Mercuric Cyanide." 1987.
Mercuric Cyanide (accessed April 2, 2009).
Jump up ^ Benaissa M.L., Hantson P., Bismuth C., Baud F.J. (1995). "Mercury oxycyanide and mercuric cyanide poisoning: two cases.". Intensive Care Med. 21 (12): 1051–1053. doi:10.1007/BF01700673. PMID 8750135.
Jump up ^ Aylett, B.J. "Mercury (II) Pseudohalides: Cyanide, Thiocyanate, Selenocyanate, Azide, Fulminate." Comprehensive Inorganic Chemistry 3:304-306. J.C. Bailar, H.J. Emeléus, Sir Ronald Nyholm, and A.F. Trotman-Dickenson, ed. Oxford: Pergamon Press, 1973; distributed by Compendium Publishers (Elmsford, NY), p. 304.
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^ Jump up to: a b The Karen Wetterhahn story - University of Bristol web page documenting her death, retrieved December 9, 2006.
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Jump up ^ What you need to know about mercury in fish and shellfish - Advice for women who might become pregnant women who are pregnant nursing mothers young children. U.S. FDA and U.S. EPA Advisory EPA-823-F-04-009, March 2004.
^ Jump up to: a b Mozaffarian D, Rimm EB (2006). "Fish intake, contaminants, and human health: evaluating the risks and the benefits". JAMA 296 (15): 1885–99. doi:10.1001/jama.296.15.1885. PMID 17047219.
^ Jump up to: a b Ibrahim D, Froberg B, Wolf A, Rusyniak DE (2006). "Heavy metal poisoning: clinical presentations and pathophysiology". Clin Lab Med 26 (1): 67–97, viii. doi:10.1016/j.cll.2006.02.003. PMID 16567226.
Jump up ^ "Export-ban of mercury and mercury compounds from the EU by 2011" (Press release). European Parliament. 2008-05-21. Retrieved 2008-06-10.
Jump up ^ ATSDR - Mercury - Regulations and Advisories
Jump up ^ What You Need to Know about Mercury in Fish and Shellfish
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Jump up ^ Risher JF, Amler SN (2005). "Mercury exposure: evaluation and intervention the inappropriate use of chelating agents in the diagnosis and treatment of putative mercury poisoning". Neurotoxicology 26 (4): 691–9. doi:10.1016/j.neuro.2005.05.004. PMID 16009427.
^ Jump up to: a b Rooney JP (2007). "The role of thiols, dithiols, nutritional factors and interacting ligands in the toxicology of mercury". Toxicology 234 (3): 145–56. doi:10.1016/j.tox.2007.02.016. PMID 17408840.
Jump up ^ Watanabe C (2002). "Modification of mercury toxicity by selenium: practical importance?" (PDF). Tohoku J Exp Med 196 (2): 71–7. doi:10.1620/tjem.196.71. PMID 12498318.
Jump up ^ Hazards of chelation therapy:
Brown MJ, Willis T, Omalu B, Leiker R (2006). "Deaths resulting from hypocalcemia after administration of edetate disodium: 2003–2005". Pediatrics 118 (2): e534–6. doi:10.1542/peds.2006-0858. PMID 16882789.
Baxter AJ, Krenzelok EP (2008). "Pediatric fatality secondary to EDTA chelation". Clin Toxicol 46 (10): 1083–4. doi:10.1080/15563650701261488. PMID 18949650.
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Jump up ^ Waldron HA (1983). "Did the Mad Hatter have mercury poisoning?". Br Med J (Clin Res Ed) 287 (6409): 1961. doi:10.1136/bmj.287.6409.1961. PMC 1550196. PMID 6418283.
Jump up ^ An Account of the Effect of Mercurial Vapors on the Crew of His Majesty's Ship Triumph, in the year 1810. By Wm. Burnet, M.D. one of the Medical Commissioners of the Navy, formerly Physician and Inspector of Hospitals to the Mediterranean Fleet.
Jump up ^ Michael J. Doherty MD: The Quicksilver Prize: Mercury vapor poisoning aboard HMS Triumph and HMS Phipps (2003).
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Jump up ^ Occupational Safety and Health Guideline for Mercury, OSHA, US Department of Labor
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