Energy consumption

Energy consumption

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Energy consumption is the consumption of energy
In physics, energy is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems...

 or power
Power (physics)
In physics, power is the rate at which energy is transferred, used, or transformed. For example, the rate at which a light bulb transforms electrical energy into heat and light is measured in watts—the more wattage, the more power, or equivalently the more electrical energy is used per unit...

. It is covered in the following articles and categories:
  • World energy consumption
  • Domestic energy consumption
    Domestic Energy Consumption
    Domestic energy consumption is the amount of energy that is spent on the different appliances used within housing. The amount of energy used per household varies widely depending on the standard of living of the country, climate, and the age and type of residence...

  • Fuel efficiency in transportation
    Fuel efficiency in transportation
    The fuel efficiency in transportation ranges from some hundred kilojoule per kilometre for a bicycle to several megajoule for a helicopter.Efficiency can be expressed in terms of consumption per unit distance per vehicle, consumption per unit distance per passenger or consumption per unit distance...

  • Electric energy consumption
  • Electricity generation
    Electricity generation
    Electricity generation is the process of generating electric energy from other forms of energy.The fundamental principles of electricity generation were discovered during the 1820s and early 1830s by the British scientist Michael Faraday...

  • Energy transformation
  • Energy policy
    Energy policy
    Energy policy is the manner in which a given entity has decided to address issues of energy development including energy production, distribution and consumption...

Reduction of energy consumption

  • Energy conservation
    Energy conservation
    Energy conservation refers to efforts made to reduce energy consumption. Energy conservation can be achieved through increased efficient energy use, in conjunction with decreased energy consumption and/or reduced consumption from conventional energy sources...

    , the practice of decreasing the quantity of energy used
  • Efficient energy use
    Efficient energy use
    Efficient energy use, sometimes simply called energy efficiency, is the goal of efforts to reduce the amount of energy required to provide products and services. For example, insulating a home allows a building to use less heating and cooling energy to achieve and maintain a comfortable temperature...