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The Law of Conservation of Energy (aka. the first law of thermodynamics) states that energy cannot be created or destroyed. So what is the logic behind the term renewable energy? The energy from burned oil hasn’t left the universe at all. That energy cannot be “made new” since it has been around for billions of years and will exist as long as the universe itself does. Thus, just as one doesn’t create new energy, no form of energy is truly renewable. We can only change the form of an energy source and then use it to our advantage.