Adventures on Marijuana; all you need to know:
Marijuana is one of the earliest psychoactive substances used by man. It is a blend of the dried leaves and inflorescence of the plant Cannabis Sativa, known as Indian hemp. It may either be green, gray, or brown. Marijuana is made from the Cannabis plant, which has three species: Cannabis ruderalis, Cannabis sativa, and Cannabis indica. Marijuana is also dubbed Blanche, bhang, hashish, reefer, herb, pot, ganja, old man, grass, weed, hash, sinsemilla, tar, hash oil, dagga, and chronic.
Low-grade marijuana comprises 1 to 4 percent delta-9-tetrahydrocannabinol (THC), which is what is usually sold recreationally. THC is recognized as the most active psychoactive agent in cannabis. Sinsemilla, which is high-grade marijuana, contains 7 to 8 percent THC while hashish is between 7 and 20 percent. Hash oil is the most intense form of cannabis and contains up to 70% THC.