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any natural resource (as wood or solar energy) that can be replenished naturally with the passage of time
materials found in nature that CANNOT be renewed or replaced within a reasonable passage of time
any material in nature that people use and value
a substance that can be consumed to produce energy
a process in which a substance reacts with oxygen to give heat and light
a nonrenewable energy resource formed from the remains of organisms that lived long ago
an organic compound containing only carbon and hydrogen
energy from the sun that is converted into thermal or electrical energy
electricity generated by flowing water
Fuel that derives from plant material and animal waste
energy derived from the heat in the interior of the earth
the splitting of the nucleus of a large atom into two or more fragments; releases additional neutrons and energy
the combination of the nuclei of small atoms to form a larger nucleus; releases energy