Section 2:  Alternative Energy and Conservation

Chapter 18 Section 2 Presentation
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Key Terms:

• alternative energy
• ocean thermal energy conversion (OTEC)
  
• fuel cell
  
• energy efficiency
  
• energy conservation
  

Main Ideas:

• Alternative energy sources are energy sources that are still in development.
• Ocean thermal energy conversion (OTEC) uses the temperature difference between layers of ocean water to generate electricity.
  
• Hydrogen may be one of the fuels of the future.  It can be made from any organic material and produces only water as a waste product when burned.
  
• Hydrogen fuel cells may be the engines of the future.  Many experiments with them are now underway.
  
• Energy efficiency is the percentage of energy put into a system that does useful work.  Energy conservation means saving energy.