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  2. Photosynthetic efficiency - Wikipedia

    en.wikipedia.org/wiki/Photosynthetic_efficiency

    28.2% (sunlight energy collected by chlorophyll) → 68% is lost in conversion of ATP and NADPH to d-glucose, leaving; 9% (collected as sugar) → 35–40% of sugar is recycled/consumed by the leaf in dark and photo-respiration, leaving; 5.4% net leaf efficiency. Many plants lose much of the remaining energy on growing roots.

  3. Environmental impact of the energy industry - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    Energy conservation can be achieved through increased efficient energy use, in conjunction with decreased energy consumption and/or reduced consumption from conventional energy sources. Energy conservation can result in increased financial capital, environmental quality, national security, personal security, and human comfort. [55]

  4. Efficient energy use - Wikipedia

    en.wikipedia.org/wiki/Efficient_energy_use

    Common energy efficiency label on appliances to indicate their energy efficiency in a clear manner. Efficient energy use, or energy efficiency, is the process of reducing the amount of energy required to provide products and services. There are many technologies and methods available that are more energy efficient than conventional systems.

  5. Sustainable energy - Wikipedia

    en.wikipedia.org/wiki/Sustainable_energy

    Energy efficiency—using less energy to deliver the same goods or services, or delivering comparable services with less goods—is a cornerstone of many sustainable energy strategies. [ 36 ] [ 37 ] The International Energy Agency (IEA) has estimated that increasing energy efficiency could achieve 40% of greenhouse gas emission reductions ...

  6. Ecological efficiency - Wikipedia

    en.wikipedia.org/wiki/Ecological_efficiency

    In comparing the cultivation of animals versus plants, there is a clear difference in magnitude of energy efficiency. Edible kilocalories produced from kilocalories of energy required for cultivation are: 18.1% for chicken , 6.7% for grass-fed beef, 5.7% for farmed salmon , and 0.9% for shrimp .

  7. Energy conservation - Wikipedia

    en.wikipedia.org/wiki/Energy_conservation

    Measurable energy conservation and efficiency gains in the 1980s led to the 1987 Energy Security Report to the President (DOE, 1987) that "the United States uses about 29 quads less energy in a year today than it would have if our economic growth since 1972 had been accompanied by the less- efficient trends in energy use we were following at ...

  8. Climate change mitigation - Wikipedia

    en.wikipedia.org/wiki/Climate_change_mitigation

    Nearly all scenarios and strategies involve a major increase in the use of renewable energy in combination with increased energy efficiency measures. [40]: xxiii It will be necessary to accelerate the deployment of renewable energy six-fold from 0.25% annual growth in 2015 to 1.5% to keep global warming under 2 °C. [41]

  9. Photosynthesis - Wikipedia

    en.wikipedia.org/wiki/Photosynthesis

    Scientists are studying photosynthesis in hopes of developing plants with increased yield. [40] The efficiency of both light and dark reactions can be measured, but the relationship between the two can be complex. For example, the light reaction creates ATP and NADPH energy molecules, which C 3 plants can use for carbon fixation or ...