a form of energy obtained from within the earth, originating in its core; also, energy produced by extracting the earth's internal heat
pertaining to the generation and distribution of electricity derived from the energy of falling water or any other hydraulic source
power derived from wind: used to generate electricity or mechanical power
the use of the rise and fall of tides involving very large volumes of water at low heads to generate electric power
energy derived from biofuel
energy derived from the sun in the form of solar radiation
power extracted from the motion of sea waves at the coast
