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AP Environmental Science Mr. Grant Lesson 91

AP Environmental Science Mr. Grant Lesson 91. Sources of Energy & Coal, Natural Gas, and Oil (Part 1). Objectives:. Define the term fossil fuels . Identify the energy sources that we use. Describe the nature and origin of coal, and evaluate its extraction and use.

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AP Environmental Science Mr. Grant Lesson 91

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  1. AP Environmental Science • Mr. Grant • Lesson 91 Sources of Energy & Coal, Natural Gas, and Oil (Part 1)

  2. Objectives: • Define the term fossil fuels. • Identify the energy sources that we use. • Describe the nature and origin of coal, and evaluate its extraction and use. • Describe the nature and origin of natural gas, and evaluate its extraction and use.

  3. Define the term fossil fuels. Fossil Fuels

  4. Identify the energy sources that we use. • A variety of renewable and nonrenewable energy sources are available to us. • Since the industrial revolution, nonrenewable fossil fuels have become our primary sources of energy. • Oil, Natural Gas, and Coal • Fossil fuels are formed very slowly… • Buried organic matter is transformed by… • heat • pressure • anaerobic decomposition • In evaluating energy sources, it is important to compare… • Amount of energy obtained from the fuel, to • Amount of energy invested in its extraction.

  5. We use a variety of energy sources

  6. Fossil fuels are our dominant source of energy

  7. Resources are renewable or nonrenewable

  8. Fossil fuels are indeed created from fossils

  9. Fossil fuel reserves are unevenly distributed

  10. Developed nations consume lots of energy

  11. Regions vary greatly in energy consumption

  12. It takes energy to make energy

  13. Energy returned on investment (EROI)

  14. Describe the nature and origin of coal, and evaluate its extraction and use. • Coal is our most abundant fossil fuel. • First used widely for heating homes • Now used principally for electricity generation • Coal is mined… • underground • strip mined from the land surface • Coal comes in different types and varieties. • Combustion of coal is high in contaminants and pollution.

  15. Coal

  16. Coal use has a long history

  17. Coal is mined from the surface and below ground

  18. Two forms of coal mining

  19. Coal varies in its qualities

  20. Coal contains impurities

  21. Describe the nature and origin of natural gas, and evaluate its extraction and use. • Natural gas consists mostly of methane and is formed in two ways... • Biogenic gas: formed by the underground anaerobic decomposition of organic matter. • Thermogenic gas: formed by pressure and heat. • Use of natural gas is growing. • Burns cleaner than oil or coal • Natural gas also occurs with oil and coal deposits.

  22. Natural gas

  23. Natural gas is formed in two ways

  24. Natural gas is often wasted

  25. Natural gas has only recently been widely used

  26. Natural gas extraction becomes more challenging

  27. Offshore drilling produces much of our gas

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