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ENERGY RESOURCES, Fossil fuel, Why is energy efficiency an important…

- - - - Much less than
        
        fossil fuels
    - - political pressure possibilities
    - - Transitioning from one type of fuel to another
- - - - Transition best made by improving energy efficiency
        and regulating the use of natural gas
        
        continue to be used
        fossil fuels in large quantities due to abundant and artificially cheap property
- - - - depending on the source of energy
      - = total energy produced –
        energy required to produce it
- - - - a low environmental impact
      - a very low accident risk
    - - its use has been
        limited
        
        low net energy yield
        
        high costs
        
        fear of accidents
        
        long-lived radioactive wastes
      - its role in the spread of nuclear weapons technology
    - - to boil water to produce steam that spins a turbine and generates electricity.
      - Nuclear fission chemical reactions provide the heat inside a reactor
        
        process is complex and costly
        
        Fuel is uranium ore
        
        a coolant circulates through the reactor
        
        Many methods have been suggested to contain plants after closure
        
        high cost
    - - Construction and use
        
        plants generates CO2 emissions and contributes to climate change
      - Nuclear energy has not replace traditional sources
        
        Use of new technology
        
        change nuclear power development
        
        thorium instead of uranium
- - - - Lignite
        (brown coal)
        
        Bituminous
        (soft coal)
        
        Anthracite
        (hard coal)
  - - - Regulations for usage are needed, but utilities
        using coal fight regulations and taxes
- - - - Large potential
        supplies
      - Easily transported within and between countries
      - Efficient distribution system in place
    - - Low net energy yield
      - Releases CO2 and other air pollutants when produced and burned
      - Severe land disruption
        and high water use
- - - - Cooking
      - Heating
      - Industrial purposes
  - - - low net energy yield for LNG
      - production and delivery may emit more CO2 and CH4 per unit of energy produced than coal
      - fracking uses and pollutes large volumes of water
      - potential groundwater pollution from fracking
    - - Versatile fuel
      - Ample supplies
      - Medium net energy yield
      - Emits less CO2 when burned compared to fossil fuel