Energy efficiency may refer to:
- Efficient energy use, sometimes simply called energy efficiency.
- Energy efficiency in transportation.
- Energy conversion efficiency, the ratio between the output and input of an energy conversion machine.
- Energy conservation, efforts made to reduce energy consumption.
Famous quotes containing the words energy and/or efficiency:
“A great number of the disappointments and mishaps of the troubled world are the direct result of literature and the allied arts. It is our belief that no human being who devotes his life and energy to the manufacture of fantasies can be anything but fundamentally inadequate”
—Christopher Hampton (b. 1946)
““Never hug and kiss your children! Mother love may make your children’s infancy unhappy and prevent them from pursuing a career or getting married!” That’s total hogwash, of course. But it shows on extreme example of what state-of-the-art “scientific” parenting was supposed to be in early twentieth-century America. After all, that was the heyday of efficiency experts, time-and-motion studies, and the like.”
—Lawrence Kutner (20th century)