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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 Definition. Wind power is a form of renewable energy. The definition of renewable energy is much debated since the terms and definitions people choose have huge impacts on policy and regulations.People have been using renewable energy of one sort or another for hundreds of years.he definition of renewable energy is much debated since the terms and definitions people choose have huge impacts on policy and regulations. People have been using renewable energy of one sort or another for hundreds of years.