Close-up of flowering cannabis plant
A man smoking cannabis in Kolkata, India
Main short-term physical effects of cannabis
Sebsi, a Moroccan long-drawtube one-hitter.
A joint prior to rolling, with a paper handmade filter on the left
Addiction experts in psychiatry, chemistry, pharmacology, forensic science, epidemiology, and the police and legal services engaged in delphic analysis regarding 20 popular recreational drugs. Cannabis was ranked 11th in dependence, 17th in physical harm, and 10th in social harm.
A glass bong filled with water and its bowl packed with cannabis.
Types of cannabis
Spotting knives heating
A macro cannabis bud
Glass blades
Present-day map of the Jirzankal Cemetery, site of the earliest evidence of cannabis smoking
Cannabis sativa from Vienna Dioscurides, c. 512 CE
Anti-Cannabis propaganda from 1935
Cannabis indica fluid extract, American Druggists Syndicate (pre-1937)
Process of making bhang in a Sikh village in Punjab, India. On the Hindu and Sikh festival of colors called Holi, it is a customary addition to some intoxicating drinks.
countries that have legalized medical use of cannabis
Example of a container and the recreational cannabis purchase in Canada.
Woman selling cannabis and bhang in Guwahati, Assam, India
Dried flower buds (marijuana)
A gram of kief
Hashish
Hash oil
Infusion (dairy butter)

Cannabis smoking (or colloquially smoking pot) is the inhalation of smoke or vapor released by heating the flowers, leaves, or extracts of cannabis and releasing the main psychoactive chemical, Δ9-tetrahydrocannabinol (THC), which is absorbed into the bloodstream via the lungs.

- Cannabis smoking

Cannabis can be used by smoking, vaporizing, within food, or as an extract.

- Cannabis (drug)
Close-up of flowering cannabis plant

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A vaporization heat wand and vaporization chamber bowl used to deliver vapor through a water pipe

Vaporizer (inhalation device)

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Device used to vaporize substances for inhalation.

Device used to vaporize substances for inhalation.

A vaporization heat wand and vaporization chamber bowl used to deliver vapor through a water pipe
Various types of electronic cigarettes.
Vaporizer with water-cooling
A conduction-style vaporizer
A passive-convection "vaporization pipe" with flame filter
A portable radiation vaporiser
A Storz & Bickel Volcano, a forced-air vaporizer. The detachable balloon (top) fills with vapors that are then inhaled

Plant substances can be used, commonly cannabis, tobacco, or other herbs or blends of essential oil.

Vaporizing is more efficient than smoking, because approximately 30% of THC in cannabis or hashish cigarettes is destroyed by pyrolysis during smoking.

Kief collected from a grinder with a screen

Kief

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Kief collected from a grinder with a screen
Kief collected from a sieve
Approximately one gram of screen-sifted cannabis trichomes, commonly referred to as kief
Kief collected from a coffee grinder

Kief (from Moroccan Arabic كيف kīf, "Joy, pleasure" ), sometimes transliterated as keef, also known as ‘’Dust’’ and "Chief" a.k.a cannabis crystals among other names, refers to the pure and clean collection of loose cannabis trichomes, which are accumulated by being sifted from cannabis flowers or buds with a mesh screen or sieve.

Traditionally, kief has been pressed into cakes of hashish for convenience in storage, although it can be vaporized or smoked in either form.