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... multiple devices continuously plugged in can however equate to as much as 10 percent of total household energy consumption. You can check how much energy your devices are each using in standby mode with ...
... gain will be beneficial for thermal comfort, and when it should be blocked with shading. By strategic placement of items such as glazing and shading devices, the percent of solar gain entering a building ...
... space, wildlife habitat, and wetlands are developed each year. As of 2006, buildings used 40 percent of the total energy consumed in both the US and European Union. In the US, 54 percent of that percentage ...
... bottom. This solar pond was capable of producing temperatures of 90 °C in its bottom layer and had an estimated solar-to-electric efficiency of two percent.  Thermoelectric, or "thermovoltaic" devices ...
... friction and rolling resistance, can save gasoline. Fuel economy can be improved over three percent by keeping tires inflated to the correct pressure. Replacing a clogged air filter can improve a cars ...
... is about 30 percent efficient, whereas combined heat and power (also called cogeneration) converts up to 90 percent of the fuel into usable energy. Advanced boilers and furnaces can operate at higher temperatures ...
... well-sealed doors, and additional thermal insulation of walls, basement slabs, and foundations can reduce heat loss by 25 to 50 percent. Dark roofs may become up to 70°F hotter than the most reflective ...
... refrigerators, for example, use 40 percent less energy than conventional models did in 2001. Modern power management systems also reduce energy usage by idle appliances by turning them off or putting them ...
... improvements that could keep global energy-demand growth at less than 1 percent per annum" -- less than half of the 2.2 percent average growth anticipated through 2020 in a business-as-usual scenario. ...
... by regional utilities. The “centralized” system has an average efficiency of 34 percent, requiring about three units of fuel to produce one unit of power. By capturing both heat and power, CHP and waste ...
... at greater than 99 percent is a concept based on outputs used to provide the next level of processing, reuse, conservation and market delivery of the derivatives.  ...
... will fill a square piece of land 35 miles on each side. This doesn''t seem a huge imposition in a country the size of America. The garbage would occupy only 5 percent of the area needed for the national ...
... either a higher percentage of new fibres must be added, or the paper downcycled into lower quality products. Any writing or colouration of the paper must first be removed by deinking, which also removes ...
... requirements for the set amount of waste to be diverted from the waste stream from 50 percent to 75 percent can produce healthy profits for companies that collect and process recyclables. Cost-benefit ...
Taxonomy by Zaragoza Online