1. Galena Cubic crystal structure Attrib-NoCom-NoDerivs: OldOnliner GNU

2. Galena typically forms in low-temperature and medium-temperature hydrothermal ore veins that occur in Attrib-NoCom-ShareAlike: Ron Schott Attrib-NoCom-NoDerivs: skylarprimm Attrib-NoCom-ShareAlike: Ron Schott igneous rocks sedimentary rocks pegmatites

3. Lubec, Maine, lead mine (from Jackson, 1837) Maine Geological Survey/State of Maine As a replacement mineral, galena can be found in sedimentary rocks, either throughout the rock or filling holes in carbonate rocks. Attrib-NoCom-NoDerivs: OldOnliner Attrib-NoCom-NoDerivs: corsakti

4. Galena is the main ore for lead, which has been used by humans for the past 8500 years Lead is easy to shape. www.theodoregray.com Attrib-ShareAlike: Andrew Dunn Lead water pipes (Roman) Lead coin (Roman)

5. Attrib-NoCom-ShareAlike: Kenners Attrib-NoDerivs: kchbrown Attrib-NoCom-ShareAlike: Oldtasty Lead is still used in decorative pottery, roofing, ammunition, crystal glass, radiation shielding, cables, batteries, and television and computer monitors. www.theodoregrey.com Attrib: Nika Attrib-NoCom: fahrenheit45one USCPSCv USCPSC

6. Attrib-NoCom-ShareAlike: mrccos This 18 th century musket fires 1 ounce of lead. This 19 th century lead bullet is from the war between the states. Attrib-ShareAlike: Unhindered by Talent Lead 9mm bullets (with copper casing) www.theodoregrey.com

7. Attrib-NoCom: ddamredhead Attrib-NoCom-ShareAlike: hermox Attrib-NoCom-ShareAlike: Monceau Attrib-NoCom-NoDerivs: j.towbin Lead is in lead crystal and leaded glass

8. Attrib-NoCom: craig1black Lead-acid batteries are the back up for servers in case of a power outage, and in solar energy systems. Lead-acid batteries, a type of wet-cell battery, are used in starting engines and powering accessories/machines. Attrib-NoCom: fahrenheit45one Attrib-NoCom: NuckleheadEd Attrib-NoCom-NoDerivs: Tom T Attrib-NoCom: Neil T

9. Attrib-NoCom: Tom Chambers Attrib: Nika Attrib-NoCom-ShareAlike: cmiked Attrib-NoDerivs: PetroleumJelliffe Lead is used as a radiation shield in medicine. Lead aprons are often used at dentists' offices to protect patients from radiation. Staff usually step behind full-body shields. City & County of Honolulu

10. Computer monitors and televisions all have a Cathode Ray Tube (CRT) which contains up to 2 pounds of lead. All CRT televisions and computer monitors must be properly recycled. USCPSC close up of CRT screen EPA USCPSC Attrib-ShareAlike: alexik What about flatscreens? Flatscreen monitors do not contain lead, but they do contain mercury which is dangerous. Attrib-NoCom-NoDerivs: CraigOppy

11. Lead in household items can enter the human body and cause lead poisoning. US EPA/R&D Washington State Department of Health Lawrence Berkley National Laboratory www.theodoregrey.com Lead in ammunition can poison meat, or can be consumed by other animals in the ecosystem. EPA

12. Attrib-NoCom-ShareAlike: cindy47452 Attrib: Soctech Attrib-NoCom-NoDerivs: R80oAttrib-ShareAlike: Unhindered by Talent Lead is harmful to the human body. It was banned in paint in 1978, in solder (for cans and water pipes) in 1986, and completely banned in gasoline by 1996. These bans will prevent many people, especially children, from becoming poisoned by lead. LBNL Attrib-NoCom-NoDerivs: pmecologic

13. Galena Cubic crystal structure Attrib-NoCom-NoDerivs: OldOnliner GNU

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