Giological materials such as plant material or animal waste converted to a usable energy source, a renewable resource
A hard, black substance extracted from the ground and burned to obtain energy, a non-renewable fossil fuel
Heat is harness from deep beneath Earth\'s surface and converted to usable energy, a renewable resource
Electricity generation using the power of falling water
Resources that will never run out
A gas usually found above petroleum deposits and burned to obtain energy, a non-renewable fossil fuel
An energy resource that takes millions of years to form from the remains of plants and animals such as coal, oil and natural gas
The splitting of uranium atoms to release energy
A think, flammable, yellow-to-black mixture of gaseous, liquid and solid hydrocarbons that occurs naturally beneath Earth\'s surface
An energy resource that is replaceable by natural means such as trees or wind
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