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  • What nutrients are used for energy?

  • The three main nutrients used for energy are carbohydrates, protein, and fats, with carbohydrates being the most important source. Your body can also use protein and fats for energy when carbs have been depleted. Click to see full answer. Also, which nutrient provides the most energy?

  • What is the main source of energy in the human body?

  • Carbohydrates are the body’s main source of energy. The fruit, vegetables, dairy, and grain food groups all contain carbohydrates. Likewise, which gives more energy protein or carbs?

  • What are the sources of energy for doing work?

  • In the United States and many other countries, most energy sources for doing work are nonrenewable energy sources: These energy sources are called nonrenewable because their supplies are limited to the amounts that we can mine or extract from the earth.

  • How do we use electricity as an energy source?

  • Learn more about how we use electricity as an energy source. The Energy Department is developing new technologies that will store renewable energy for use when the wind isn’t blowing and the sun isn’t shining. Fuel cells use the energy from hydrogen in a highly efficient way — with only water and heat as byproducts.

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