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alternative energy-energy derived from sources that do not use up natural resources or harm the environment. energy, free energy - (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; energy can take a wide variety of forms.
renewable energy is energy which is generated from naturally occurring resources such as sunlight water and wind this type of energy is also known as green power or clean energy as it doesn t pollute the water or atmosphere here at gw renewable we supply and install a range of solutions for sustainable energy in somerset taunton dorset and many other surrounding local areas