The word efficiency is a noun. Efficiency means (1) skillfulness in avoiding wasted time and effort, (2) the ratio of the output to the input of any system.
The following articles and web pages elaborate on the word efficiency.
Fuel Economy is a website developed by the U.S. Dept. of Energy, Energy Efficiency and Renewable Energy. On this site users can find information about efforts to improve automobile efficiency, gasoline prices, gas mileage tips, hybrid vehicles, alternative fuel vehicles, and can find and compare new and used automobiles.
Modern washing machines make the chore of laundry much easier! Washing machines typically come in top-loading or front-loading styles, and are available in varying sizes, colors, and energy efficiency ratings.
NERL is the nation's primary laboratory for renewable energy and energy efficiency research and development. It is the major laboratory for the DOE and began in 1977 as the Solar Energy Research Institute. The website provides information about NERL, visiting, and doing business with them.
The following articles provide recent efficiency-related news.