This Short Discovery Channel documentary has very little to offer in way of use and properties of oils, but it gives you a valuable insight into the commercial essential oil farming and processing technique. Beware of YouTube videos that teach you how to make it yourself. Some of the practices are so poor, it’s scary. I had one try to show how to make essential oils with your microwave. I will resist the urge to get on my soapbox about microwaves, but let me just say that microwaved essential oil production is NOT a sanctioned and approved method here at the Int’l Institute of Natural Wellness.