What is renewable energy? Renewable energy is not a fossil fuel, it doesn't burn therefore it creates zero emossions. It is an energy source that feeds itself, or rather, it doesn't require the input of anything human in order to create the power. This means that solar, wind, hydro, tidal, friction type of power generation are all renewable. Whether by the sun, wind, current, tide or contact these methods do not require fossil fuels or carbon or anytyhing to burn.