Energy efficiency

Deutsch: Energieeffizienz / Español: Eficiencia energética / Português: Eficiência energética / Français: Efficacité énergétique / Italiano: Efficienza energetica /

Energy efficiency are technologies and measures that reduce the amount of electricity and/or Fuel required to do the same work, such as powering homes, offices and industries.

Other definition:
Energy Efficiency refers to products or systems using less energy to do the same or better job than conventional products or systems. Energy Efficiency saves energy, saves money on utility bills, and helps protect the environment by reducing the amount of electricity that needs to be generated.

Other definition:

Energy-efficiency is the ratio of the useful output of services from an article of industrial equipment to the energy use by such an article; for example, vehicle miles traveled per gallon of fuel (mpg).

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