This is my attempt to explain air pressure in ductwork. This video is part of the heating and cooling series of training videos made to accompany my websites... This is my attempt to explain air pressure in ductwork. This video is part of the heating and cooling series of training videos made to accompany my websites... Skip navigation
Medical marijuana refers to the use of the Cannabis plant as a physician-recommended herbal therapy as well as synthetic THC and cannabinoids. So far, the medical use of cannabis is legal only in a limited number of territories, including Canada, Belgium, Australia, the Netherlands, Spain, and several U.S. states.
Marijuana is an illegal drug produced from the dried leaves, stems, seeds and/or flowers of the hemp plant, cannabis sativa, that is usually smoked. There are many slang terms for marijuana, including: pot, grass, weed and Mary Jane. The drug is, by far, the most widely used illicit substance in the United States.