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  2. United States building energy codes - Wikipedia

    en.wikipedia.org/wiki/United_States_building...

    According to the U.S. Department of Energy, “energy codes and standards set minimum efficiency requirements for new and renovated buildings, assuring reductions in energy use and emissions over the life of the building.” [2] As with other building codes, model energy codes and standards are often written in a language such that they can be ...

  3. Water-energy nexus - Wikipedia

    en.wikipedia.org/wiki/Water-energy_nexus

    Hybrid Sankey diagram of 2011 U.S. interconnected water and energy flows. The water-energy nexus is the relationship between the water used for energy production, [1] including both electricity and sources of fuel such as oil and natural gas, and the energy consumed to extract, purify, deliver, heat/cool, treat and dispose of water (and wastewater) sometimes referred to as the energy intensity ...

  4. Water conservation - Wikipedia

    en.wikipedia.org/wiki/Water_conservation

    Many water-saving devices (such as low-flush toilets) that are useful in homes can also be useful for business water saving. Other water-saving technology for businesses includes: Waterless urinals (also can be installed in schools) Waterless car washes; Infrared or foot-operated taps, which can save water by using short bursts of water for ...

  5. Energy conservation - Wikipedia

    en.wikipedia.org/wiki/Energy_conservation

    About half of U.S. energy consumption in the transportation and residential sectors is primarily controlled by individual consumers. In the typical American home, space heating is the most significant energy use, followed by electrical technology (appliances, lighting, and electronics) and water heating. [2]

  6. Water efficiency - Wikipedia

    en.wikipedia.org/wiki/Water_efficiency

    Water efficiency is the practice of reducing water consumption by measuring the amount of water required for a particular purpose and is proportionate to the amount of essential water used. [ 1 ] [ 2 ] Water efficiency differs from water conservation in that it focuses on reducing waste, not restricting use. [ 3 ]

  7. Efficient energy use - Wikipedia

    en.wikipedia.org/wiki/Efficient_energy_use

    In fact, International Energy Agency has calculated that the application of energy efficiency measures in the years 1974-2010 has succeeded in avoiding more energy consumption in its member states than is the consumption of any particular fuel, including fossil fuels (i.e. oil, coal and natural gas).

  8. Water scarcity - Wikipedia

    en.wikipedia.org/wiki/Water_scarcity

    Increasing use of groundwater can also reduce water quality over time. Groundwater systems often show falls in natural outflows, stored volumes, and water levels as well as water degradation. [32] Groundwater depletion can cause harm in many ways. These include more costly groundwater pumping and changes in salinity and other types of water ...

  9. Energy quality - Wikipedia

    en.wikipedia.org/wiki/Energy_quality

    Energy quality is a measure of the ease with which a form of energy can be converted to useful work or to another form of energy: i.e. its content of thermodynamic free energy. A high quality form of energy has a high content of thermodynamic free energy, and therefore a high proportion of it can be converted to work; whereas with low quality ...

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