What are the best energy sources? "Best" depends on many factors—how the energy is being used, where it is being used.
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Ever wondered how an oil refinery works? Now you can learn more about the technology involved in refining crude oil into the thousands of petroleum-based products you use everyday.
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Nonrenewable energy resources include coal, oil, natural gas, and uranium-235. Here are some of the key characteristics for these nonrenewable energy resources.
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Energy resources are often characterized as renewable and nonrenewable. Here are key characteristics of renewable energy resources.
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The short answer: it's the driving force of life. Every living organism does work, and needs energy from food or photosynthesis. Learn more about energy and the many forms that it can take.
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