The significance of renewable energy

English name: renewable energy resources; renewable energy
Definition 1: The original self-recovery characteristics, and sustainable use of primary energy. Including solar, hydro, biomass, hydrogen, wind, wave and ocean heat between the surface and deep circulation. Geothermal energy can also be counted as renewable energy.
Applied science: power (a subject); power planning, design and construction (two subjects)
Definition 2: regeneration in nature and can continue to be replenished regularly, or re-use of energy. Such as solar, wind, hydro, biomass, tidal and so on. (also can be converted into a battery, as the energy)
Applied science: Resource Technology (one subject); energy resources, science (two disciplines)