First, cannabis plants are usually harvested by hand and then hung in barns where they are dried for a period of about 10 to 14 days. These biodegradable materials possess volatile carbon and require a slow curing process for their preservation. One of the ways utilized in the extraction process is ethanol extraction whereby the hemp is soaked in iodine to release the cannabinoids and terpenes. The oils are then created by evaporating the ethanol.