Energy Efficiency Fundamentals

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What is energy efficiency?
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Energy efficiency refers to the method of reducing energy consumption while achieving the same level of energy service.
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How does improving energy efficiency differ from energy conservation?
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Energy efficiency focuses on using less energy to perform the same task, while energy conservation involves behavioral changes to reduce energy use.
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Name a common household appliance that has been made more energy efficient in recent years.
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Refrigerators have become more energy efficient, often using advanced insulation and more efficient compressors.
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What role does the Energy Star program play in energy efficiency?
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The Energy Star program certifies products that meet energy efficiency standards set by the EPA, helping consumers identify energy-saving products.
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Why is reducing standby power in appliances important for energy efficiency?
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Reducing standby power is crucial because it can account for 5-10% of household energy consumption, contributing significantly to energy waste.
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What is an energy audit, and why is it important?
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An energy audit evaluates a building's energy use to identify ways to improve energy efficiency and reduce waste.
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How do LED bulbs contribute to energy efficiency?
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LED bulbs contribute to energy efficiency by using about 75% less energy and lasting 25 times longer than traditional incandescent bulbs.
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What impact does improving energy efficiency have on carbon emissions?
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Improving energy efficiency can significantly reduce carbon emissions by decreasing the amount of fossil fuels burned for energy.
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Describe one governmental policy that promotes energy efficiency.
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One policy is mandating energy performance standards for buildings and appliances, ensuring they meet certain efficiency criteria before sale or use.
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In what ways can improving energy efficiency benefit businesses?
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Improving energy efficiency can reduce operational costs, enhance sustainability, and often provide tax incentives or rebates.
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How do smart meters improve energy efficiency?
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Smart meters improve energy efficiency by providing real-time data on energy usage, helping consumers adjust their habits to reduce consumption.
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What is the rebound effect in energy efficiency?
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The rebound effect occurs when potential energy savings are offset by increased usage due to improvements in energy efficiency.
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Why is building insulation important for energy efficiency?
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Building insulation prevents heat transfer, reducing the need for heating and cooling and thus enhancing energy efficiency.
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How do public transportation systems support energy efficiency in urban areas?
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Public transportation reduces energy consumption per capita by decreasing the need for individual car use, thereby improving urban energy efficiency.
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Explain how energy-efficient windows work.
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Energy-efficient windows have special coatings and gas fills that reduce heat loss and solar heat gain, improving thermal performance.
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