<unk>  () is a genus of flowering plants in the family Cannabaceae. The number of species within the genus is disputed. Three species may be recognized:<unk>  sativa,<unk>  indica, and<unk>  ruderalis; C. ruderalis may be included within C. sativa; all three may be treated as subspecies of a single species, C. sativa; or C. sativa may be accepted as a single undivided species. The genus is widely accepted as being indigenous to and originating from Asia. The plant is also known as hemp, although this term is often used to refer only to varieties of<unk>  cultivated for non-drug use.<unk>  has long been used for hemp fibre, hemp seeds and their oils, hemp leaves for use as vegetables and as juice, medicinal purposes, and as a recreational drug. Industrial hemp products are made from<unk>  plants selected to produce an abundance of fiber. To satisfy the UN Narcotics Convention, some<unk>  strains have been bred to produce minimal levels of tetrahydrocannabinol (THC), the principal psychoactive constituent. Some strains have been selectively bred to produce a maximum of THC (a<unk> oid), the strength of which is enhanced by curing the fruits. Various compounds, including hashish and hash oil, are extracted from the plant. In the US, "industrial hemp" is classified by the federal government as<unk>  containing no more than 0.3% THC by dry weight. This classification was established in the 2018 Farm Bill and was refined to include hemp-sourced extracts,<unk> oids, and derivatives in the definition of hemp. Globally, in 2013, 60,400 kilograms of<unk>  were produced legally. In 2014 there were an estimated 182.5 million<unk>  users (3.8% of the population aged 15–64). This percentage did not change significantly between 1998 and 2014.
Cannabis
Heroin
Cocaine
Cocaine 
Benzyl alcohol
Phencyclidine
Methamphetamine
Nicotine