Renewable Energy Sources
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Questions and Answers

What percentage of the world's total energy is supplied by renewable energy sources?

  • 20%
  • 50%
  • 13.5% (correct)
  • 10%

    • What is the process by which green plants convert sunlight into plant material?

  • Photosynthesis (correct)
  • Fermentation
  • Decomposition
  • Respiration

    • By what year could alternative energy sources provide half of the world's energy needs, according to some studies?

  • 2050 (correct)
  • 2030
  • 2040
  • 2060

    • What is the main source of biomass energy in less-developed countries?

    <p>Fuelwood</p> Signup and view all the answers

    What is the competitive energy source with renewable energy sources?

    <p>Fossil fuel sources</p> Signup and view all the answers

    What percentage of world energy consumption is accounted for by the 25 member countries of the Organization for Economic Cooperation and Development (OECD)?

    <p>40 percent</p> Signup and view all the answers

    What is the approximate percentage of conventional fossil fuels in the total energy consumption?

    <p>85 percent</p> Signup and view all the answers

    What is the primary factor determining energy use?

    <p>Political stability in oil-producing countries</p> Signup and view all the answers

    What are nonrenewable energy sources characterized by?

    <p>Resources being used faster than can be replenished</p> Signup and view all the answers

    What was the effect of declining energy costs in North America and Europe during the 1980s?

    <p>People became less concerned about energy consumption</p> Signup and view all the answers

    What percentage of world energy consumption is accounted for by oil?

    <p>33 percent</p> Signup and view all the answers

    What is the primary source of renewable energy used worldwide?

    <p>Hydroelectricity</p> Signup and view all the answers

    What is the primary difference between a resource and a reserve?

    <p>A resource is a naturally occurring substance, while a reserve is a substance that can be economically extracted</p> Signup and view all the answers

    What geological process transformed organic matter into coal?

    <p>Heat and pressure from sediment</p> Signup and view all the answers

    What is the approximate percentage of global energy provided by renewable energy sources?

    <p>12%</p> Signup and view all the answers

    What is the primary environment in which plants accumulated to form coal?

    <p>Freshwater swamps</p> Signup and view all the answers

    What is the primary factor that affects the levels of fossil fuel reserves?

    <p>All of the above</p> Signup and view all the answers

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