marijuana(canabis)

INTRODUCTION WITH BRIEF HISTORY
Cannabis, also known as marijuana , hashish,Charas ,garda is a preparation of the Cannabis plant.Contemporary uses of cannabis are as a recreational drug, as religious or spiritual rites, or as medicine; the earliest recorded uses date from the 3rd century BC.  the United Nations estimated that global consumption of cannabis indicated that approximately 4.0 percent of the adult world population (162 million people) used cannabis annually, and that approximately 0.6 percent (22.5 million) of people used cannabis daily.
EFFECTS

Cannabis can be habit-forming and the development of cannabis dependence in some users has been well established; its effects on intelligence, memory, respiratory functions and the possible relationship of cannabis use to mental disorders such as schizophrenia, psychosis, depersonalization disorder and depression are still under discussion. A study published in the American Journal of Epidemiology in 2011, concluded that the prevalence of obesity is lower in cannabis users than in nonusers.

A 35-year study published August 2012 in Proceedings of the National Academy of Sciences and funded partly by NIDA and other NIH institutes provides objective evidence that, at least for adolescents, marijuana is harmful to the brain. It was found that the persistent, dependent use of marijuana before age 18 showed lasting harm to a person's intelligence, attention and memory. Quitting cannabis did not appear to reverse the loss. However, individuals who started cannabis use after the age of 18 did not show similar declines.
A July 2012 report in Brain reveals neural-connectivity impairment in some brain regions following prolonged cannabis use initiated in adolescence or young adulthood.
it has many forms unprocessed and processed. The processed forms are kief,hashish,hash oil having other names as charas, garda according to purity.
CONSUMPTION
Cannabis is consumed in many different ways, most of which involve inhaling vaporized cannabinoids ("smoke") from small pipes, bongs (portable version of hookah with water chamber), paper-wrapped joints or tobacco-leaf-wrapped blunts. depends on how innovative you possibly can :D.