Most cheapest energy

HOW we can save energy and in what way we can produce energy by cheapest way.
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  1. Who is "we"? As in the world population? The US? You?

    There are a thousand sites dedicated to energy use. https://www.google.com/search?q=saving+energy+tips&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
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