17 - Mining environmental problems 1 Where fossil fuels...

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1 Lecture 17 Mining: environmental problems • 1. Where fossil fuels come from • 2. Definitions • 3. Methods of mining • 4. Environmental problems • 5. Solutions Ancient plant matter fuels society • Global energy use: About 50 billion tons were necessary to generate the fossil fuels burned in 2003 • This is >450 times as much plant matter as grows on Earth each year Dukes 2003, Climatic Change Mineral resources • USA has 5% of world population, but uses: – 26% of petroleum output, – 27% of silver output, – 21% of copper and lead output. We use 13.5 tons of minerals & fuels per person annually. Mineral resources • Case study: • American Barrick Resources (Canadian mining company; Barrick Gold Corp.) • 1994: Bought the mining rights from US government for estimated 30 million ounces of gold – potential of $11 billion – on federal land. Mineral resources • Mining rights to 30 million oz gold : • Cost: < $10,000 (about $5 / ac) • Why? General mining act of 1872 Mining as an industry • Main federal agency: – U.S. Bureau of Mines
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This note was uploaded on 04/06/2011 for the course FNR 103 taught by Professor Staff during the Fall '08 term at Purdue.

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17 - Mining environmental problems 1 Where fossil fuels...

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