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Lead in the Environment Unit 1: Lead and Human Society

Lead in the Environment Unit 1: Lead and Human Society. Lead through history:. Activity 1.1: Pre-assessment. Why might people living in different places at different times have varied levels of lead in their blood?. How lead gets into our environment. Mining Industrial uses of lead

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Lead in the Environment Unit 1: Lead and Human Society

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  1. Lead in the Environment Unit 1: Lead and Human Society

  2. Lead through history:

  3. Activity 1.1: Pre-assessment Why might people living in different places at different times have varied levels of lead in their blood?

  4. How lead gets into our environment • Mining • Industrial uses of lead • Consumer products • Leaded paint • Lead in gasoline Lead Mine in Derbyshire, England https://upload.wikimedia.org/wikipedia/commons/2/2f/Goodluck_Mine_-_Adit_-_geograph.org.uk_-_2297145.jpg Leaded gasoline was a major source of exposure during the second half of the 20th century. http://blog.case.edu/think/2010/08/09/leaded_gasoline_predominant_source_of_lead_exposure_in_latter_20th_century

  5. How much lead is too much? EnvironmentalControls in USA BLL threshold for determination of lead poisoning, CDC

  6. Even low levels of lead lower IQ http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline

  7. Behavioral and social effects of lead exposure Burns et al., 1999. Lifetime low-level exposure to environmental lead and children’s emotional and behavioral development at ages 11-13 years. Am J Epi. 149(8).

  8. National trends for incidence of lead poisoning http://www.cdc.gov/nceh/lead/data/stateconfirmedbyyear_1997_2013.pdf

  9. Summary: Lead Poisoning • Lead is a natural metal used by humans for thousands of years • These uses put lead into our environment • When lead gets into the body, it damages: • Brain • Soft organs (kidney, heart) • Bones • Lead is most harmful to children • No lower threshold has been found for effects of lead • In general, lead poisoning cannot be treated and cognitive deficits are irreversible GOAL: reduce or prevent children’s exposure to lead

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