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AP Environmental Science Mr. Grant Lesson 97

AP Environmental Science Mr. Grant Lesson 97. Bioenergy & Hydroelectric Power. Objectives:. Define the term biomass energy . Describe the major sources, scale, and impacts of bioenergy. Describe the scale, methods, and impacts of hydroelectric power. Define the terms biomass energy.

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AP Environmental Science Mr. Grant Lesson 97

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  1. AP Environmental Science • Mr. Grant • Lesson 97 Bioenergy & Hydroelectric Power

  2. Objectives: • Define the term biomass energy. • Describe the major sources, scale, and impacts of bioenergy. • Describe the scale, methods, and impacts of hydroelectric power

  3. Define the terms biomass energy. Biomass Energy

  4. Describe the major sources, scale, and impacts of biomass energy • Fuelwood remains the major source od biomass energy today, especially in developing nations. • Biofuels, including ethanol and biodiesel, are used to power automobiles… • Some crops are grown specifically for this purpose, and waste oils are also used. • Biomass is used to generate electrical power… • Sources include special crops as well as waste products from agriculture and forestry. • Biomass energy, theoretically, adds no net carbon to the atmosphere and can use waste efficiently, but… • Harvesting of wood can lead to deforestation, and… • Growing crops solely for fuel production is inefficient and ecologically damaging.

  5. Biomass energy

  6. Biomass sources are widely used

  7. Biomass can be overharvested

  8. New biomass strategies

  9. Biofuels can power automobiles

  10. Cars can run on ethanol

  11. Biodiesel is produced from vegetable oil

  12. Biopower generates electricity

  13. Biomass energy brings benefits

  14. Drawbacks of biomass energy

  15. Describe the scale, methods, and impacts of hydroelectric power. • Hydroelectric power is generated when water from a river runs through a powerhouse and turns turbines. • Dams and reservoirs and run-of-river systems are alternative approaches. • Hydropower produces little air pollution, but dams and reservoirs can greatly alter riverine ecology and local economies.

  16. Hydroelectric power

  17. A typical dam

  18. A run-of-river system

  19. Hydroelectric power is widely used

  20. Hydropower is clean and renewable

  21. Hydropower has negative impacts

  22. Hydropower may not expand much more

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