1. + Gold Mining Monica, Alicia, & Jon

2. + Techniques Placer Mining Panning Sifting through to try and find the denser gold Sluicing Uses a sluice box ( panning in great quantities) Dredging Largest scale of placer mining Hard Rock Mining Underground mining Byproduct Mining Looking for other minerals but obtaining enough gold to sell

3. + Location Australia North and South America Africa China

4. + Environmental Challenges Hard Rock Chemicals used along with explosives Placer Mining Take away from the surface Refinement Process Cyanide and Sulfuric Acid Wash off acid and going into wastes Nitric Acid

5. + Mercury One of the byproducts of the gold mining process Mercury is generally attached so they melt and refine it off as well

6. + Mining in Amazon Because of recent gold rush comparable to the 1850’s California gold rush there has been a mass of growth of small informal mining companies who are using bad techniques Hydraulic Mining Released excess sediment into Amazon Mercury Finding its way back into the river after refinement process Unregulated

7. + Mining in U.S. Nevada( largest gold producing state) has been suffering from large open pit mining and Cyanide heap leaching techniques CONTROVERCIES A lot of gold mines found on Government land Mining companies aren’t paying royalties