The active ingredient in marijuana is the THC which produces the high, which is a feeling of, pleasure a euphoria and wisdom, thoughts flow easily. Marijuana is illegal today but people want to legalize it for medical purposes. Cannabis is a leafy plant, which grows wild in many of the tropic and temperate areas of the world. It is cultivated both indoors and out for the production of its flowering tops. The most commonly used form of cannabis are the leaves and flowering tops (buds) which may be either smoked or eaten; It also comes in a mo ....