Aromatherapy Goes 'High Tech'New methods of essential oil extraction are entering the mainstream of aromatherapy, offering new choices in oils never before available. With the new labels of 'CO2' and 'SCO2', along with the traditional 'steam' and 'hydro' distillations, 'absolutes', and 'cold pressing', a little education for the aromatherapy enthusiast can go a long way in essential oil selection. Is one process better than another? Does one produce a nicer smelling oil, or one with greater arom.