Marijuana (Cannabis sativa), is one of those plants that is classified as a drug. In many parts of the world, people face serious consequences if they are found with it in their possession. Marijuana is however a plant, not a chemical, not a product made by man, but rather a plant native to the land.
Marijuana is highly regarded as a curative plant. Dr Sebi has a bit to say about marijuana, have a listen.
How to make cannabis oil
Cannabis oil (Cannoil) can be made by infusing cannabis buds with olive oil (or another carrier oil of choice).
What is it used for? Rub on joints or sore muscle to relieve pain or use in cooking.