Wat are the difference between essential oil n concentrated solution??

between this two, which is beta for air revitalisor?Wat are the difference between essential oil n concentrated solution??
http://en.wikipedia.org/wiki/Essential_oil





says that:





An essential oil is a concentrated, hydrophobic liquid containing volatile aromatic compounds extracted from plants. It may be produced by distillation, expression, or solvent extraction. Essential oils are used in perfumery, aromatherapy, cosmetics, incense, for flavoring food and drink, and to a lesser extent, in medicine and household cleaning products. They are valuable commodities to the fragrance and flavorant industries.





Essential oil is also known as volatile oil and ethereal oil. It may also be referred to as ';oil of'; the raw plant material from which it was extracted, such as oil of clove. The term essential is intended to indicate that the oil is the fragrant essence of the plant from which it is extracted and not in the more common sense of being indispensable. It is not to be confused with essential fatty acids.