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.
The source of the wind is the sun. The winds come from the suns energy falling on the earth's surface. This will last as long as the sun continues, and so is renewable for practical purposes into the distant future.