chapter 23 - Understanding Earth Chapter 23: THE HUMAN...

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Unformatted text preview: Understanding Earth Chapter 23: THE HUMAN IMPACT ON EARTHS ENVIRONMENT Grotzinger Jordan Press Siever The Earth at Night (an energy-intensive civilization) Reclamation as an integral aspect of coal extraction Consequences of the modern world (built on Earth resources) Effects on the Earth system (including humans) related to: extraction reFning consumption disposal Acid rain effects SO 2 + H 2 O H 2 SO 4 Current technology allows (& Clean Air Act requires in the U.S.) the capture of SO 2 from coal-fired plants, smelters, oil & gas refineries, etc., e.g. SO 2 + CaCO 3 + H 2 O CaSO 4 2H 2 O (gypsum) Health Consequences BBC.com Global Energy Consumption (and projected future demand) where is the supply? Global Energy Supply Evolution (resource use changes for various reasons) U.S. Oil Production Peaked in 1970 Global Oil Production Peak when?, but decline is inevitable (non-renewable resource) Lots of petroleum in Texas, so we must be OK in terms of energy supply? TEXAS PETROLEUM RESOURCES ! Each Texas resident consumes 6+ gallons of oil per day ! TEXAS IMPORTS ~2/3 OF THE OIL IT CONSUMES! Energy Production (transfer from one form to another) 35 Q 56 Q (61% wasted) Future energy improved efciency important, as is reducing per capita use What can we do? -- the way forward (holistic approach) ALTERNATIVE ENERGY RESOURCES...
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This note was uploaded on 07/15/2009 for the course GEO 80355 taught by Professor Kyle during the Spring '09 term at University of Texas at Austin.

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chapter 23 - Understanding Earth Chapter 23: THE HUMAN...

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