Addiction: Central nervous system (CNS) stimulants are addictive, even if they are not abused. Many factors, including the patient's personal history, the type of stimulant that is being taken, the dose of the drug, and duration of use, influence how likely an individual is to become addicted.
The source of all waves - mechanical or electromagnetic - is something that is vibrating. Matthew Donovan.
1 Original Source of Energy. The Sun provides the energy that is used by the Green Plants. The Sun is the original source of energy in all food chains on the surface of the Earth and in the upper parts of the Oceans.  Primary Producer.