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[[Image:Marijuana.jpg|thumb|250px|right|Indoor Marijuana Grow (DEA photo)]]

[[Image:Marijuana.jpg|thumb|250px|right|Indoor Marijuana Grow (DEA photo)]]

'''Marijuana''' (colloquially known as "weed" or "pot" or "dope" or "reefer") is the name given to the flowering buds of the ''cannabis sativa'' plant prepared for human consumption. The main psychoactive ingredient in marijuana is [[tetrahydrocannabinol|THC]], or delta-9-tetrahydrocannabinol, an [[organic chemistry|organic chemical]] compound which imitates natural cannabinoids produced in the human body.  Because THC is considered harmful, marijuana is generally illegal to possess, cultivate and sell in most countries, although it is legal in a some liberal jurisdictions when prescribed as by a physician.<ref>The sale of marijuana is illegal virtually everywhere in the world, and results in long prison sentences in many places. In Portugal, Argentina, California and South Australia, the use (rather than the sale) of small quantities of marijuana is allowed. In only one country in the world, the Netherlands, the sale of marijuana in small quantities is reportedly allowed by law enforcement.</ref> In some ''extremely'' liberal jurisdictions, you can even buy it in a vending machine<ref>E.g. [[Seattle]]</ref>. The crime rate in Denver has skyrocketed by 44% since marijuana was legalized in that state.

'''Marijuana''' (colloquially known as "weed" or "pot" or "dope" or "reefer") is the name given to the flowering buds of the ''cannabis sativa'' plant prepared for human consumption. The main psychoactive ingredient in marijuana is [[tetrahydrocannabinol|THC]], or delta-9-tetrahydrocannabinol, an [[organic chemistry|organic chemical]] compound which imitates natural cannabinoids produced in the human body.  Because THC is considered harmful, marijuana is generally illegal to possess, cultivate and sell in most countries, although it is legal in a some liberal jurisdictions when prescribed as by a physician.<ref>The sale of marijuana is illegal virtually everywhere in the world, and results in long prison sentences in many places. In Portugal, Argentina, California and South Australia, the use (rather than the sale) of small quantities of marijuana is allowed. In only one country in the world, the Netherlands, the sale of marijuana in small quantities is reportedly allowed by law enforcement.</ref> In some ''extremely'' liberal jurisdictions, you can even buy it in a vending machine.<ref>E.g. [[Seattle]]</ref> The crime rate in Denver has skyrocketed by 44% since marijuana was legalized in that state.

In the past two decades, the number of brain tumors has increased by up to 40% in the U.S. and Europe, particularly among men between ages of 20 and 40<ref>http://www.healthandenvironment.org/brain_cancer/peer_reviewed</ref> — the same demographic that is most likely to have smoked pot. However, conclusions based on a review of published biomedical research find that cannabinoid compounds unique to cannabis actually exhibit promising anticancer properties, reducing both tumor size and cancer pain.<ref>{{Cite journal|last=Nikan|first=Marjan|last2=Nabavi|first2=Seyed Mohammad|last3=Manayi|first3=Azadeh|date=2016-02-01|title=Ligands for cannabinoid receptors, promising anticancer agents|url=https://www.ncbi.nlm.nih.gov/pubmed/26764235|journal=Life Sciences|volume=146|pages=124–130|doi=10.1016/j.lfs.2015.12.053|issn=1879-0631|pmid=26764235}}</ref>

In the past two decades, the number of brain tumors has increased by up to 40% in the U.S. and Europe, particularly among men between ages of 20 and 40<ref>http://www.healthandenvironment.org/brain_cancer/peer_reviewed</ref> — the same demographic that is most likely to have smoked pot. However, conclusions based on a review of published biomedical research find that cannabinoid compounds unique to cannabis actually exhibit promising anticancer properties, reducing both tumor size and cancer pain.<ref>{{Cite journal|last=Nikan|first=Marjan|last2=Nabavi|first2=Seyed Mohammad|last3=Manayi|first3=Azadeh|date=2016-02-01|title=Ligands for cannabinoid receptors, promising anticancer agents|url=https://www.ncbi.nlm.nih.gov/pubmed/26764235|journal=Life Sciences|volume=146|pages=124–130|doi=10.1016/j.lfs.2015.12.053|issn=1879-0631|pmid=26764235}}</ref>

==Adverse effects==

==Adverse effects==

[[File:Brain abnormalities of marijuana user.jpg|thumbnail|Areas of the brain negatively effected by THC]]

[[File:Brain abnormalities of marijuana user.jpg|thumbnail|Areas of the brain negatively effected by THC]]

Marijuana contains many of the same carcinogens as tobacco, and some research suggests that when smoked, it shares the same risk of lung cancer<ref>[http://www.sciencedaily.com/releases/2009/06/090615095940.htm Science Daily 6/9/2009]</ref> <!--however, subsequent research has debunked these claims.<ref>{{Cite news|url=http://www.livescience.com/42738-marijuana-vs-alcohol-health-effects.html|title=Marijuana vs. Alcohol: Which Is Really Worse for Your Health?|newspaper=Live Science|access-date=February 17, 2017}}</ref> Further, these effects have not been linked directly to alternate methods of marijuana use. Marijuana use can impair short term memory while intoxicated. THC has slight negative affects on long term memory and thus, in chronic users<ref name="AskMen: Benefits of Marijuana">[http://www.askmen.com/sports/health/20_mens_health.html AskMen: Benefits of Marijuana]</ref> complications with long term memory are a risk.--> If smoked, marijuana also leads to a temporary increase in heart rate and blood pressure resulting is a slight increase in the risk for heart related problems including heart attack.<ref>[http://www.askmen.com/sports/health/20_mens_health.html AskMen: Benefits of Marijuana]</ref> Chronic smokers often suffer from mild withdrawal symptoms, however marijuana is not believed to be physically addictive.<ref>[http://www.psychologytoday.com/blog/the-teenage-mind/201012/is-marijuana-addictive Psychology Today: Is Marijuana Addictive?]</ref> Marijuana can impair judgment, motor skills, and balance.<ref>[http://www.acde.org/common/Marijana.htm]</ref> Prenatal exposure to marijuana has also been linked to impaired learning and developmental disability in children.<ref>[http://www.nature.com/npp/journal/v31/n10/full/1301068a.html Neuropsycopharmacology: High-Potency Marijuana Impairs Executive Function and Inhibitory Motor Control]</ref> If  marijuana is consumed heavily and on a daily basis by children around the age of 12 for a period of years, even liberal scientists have been forced to conclude that humans have a 1/4th random chance of developing psychosis, based on a random genetic trait.<ref>[http://www.psychiatrictimes.com/schizophrenia/cannabis-psychosis-link]The Cannabis-Psychosis Link</ref>

Marijuana contains many of the same carcinogens as tobacco, and some research suggests that when smoked, it shares the same risk of lung cancer<ref>[http://www.sciencedaily.com/releases/2009/06/090615095940.htm Science Daily 6/9/2009]</ref> <!--however, subsequent research has debunked these claims.<ref>{{Cite news|url=http://www.livescience.com/42738-marijuana-vs-alcohol-health-effects.html|title=Marijuana vs. Alcohol: Which Is Really Worse for Your Health?|newspaper=Live Science|access-date=February 17, 2017}}</ref> Further, these effects have not been linked directly to alternate methods of marijuana use. Marijuana use can impair short term memory while intoxicated. THC has slight negative affects on long term memory and thus, in chronic users<ref name="AskMen: Benefits of Marijuana">[http://www.askmen.com/sports/health/20_mens_health.html AskMen: Benefits of Marijuana]</ref> complications with long term memory are a risk.--> If smoked, marijuana also leads to a temporary increase in heart rate and blood pressure resulting is a slight increase in the risk for heart related problems including heart attack.<ref>[http://www.askmen.com/sports/health/20_mens_health.html AskMen: Benefits of Marijuana]</ref> Chronic smokers often suffer from mild withdrawal symptoms, however marijuana is not believed to be physically addictive.<ref>[http://www.psychologytoday.com/blog/the-teenage-mind/201012/is-marijuana-addictive Psychology Today: Is Marijuana Addictive?]</ref> Marijuana can impair judgment, motor skills, and balance.<ref>[http://www.acde.org/common/Marijana.htm]</ref> Prenatal exposure to marijuana has also been linked to impaired learning and developmental disability in children.<ref>[http://www.nature.com/npp/journal/v31/n10/full/1301068a.html Neuropsycopharmacology: High-Potency Marijuana Impairs Executive Function and Inhibitory Motor Control]</ref> If  marijuana is consumed heavily and on a daily basis by children around the age of 12 for a period of years, even liberal scientists have been forced to conclude that humans have a 1/4th random chance of developing psychosis, based on a random genetic trait.<ref>[http://www.psychiatrictimes.com/schizophrenia/cannabis-psychosis-link] The Cannabis-Psychosis Link</ref>

==Medical benefits==

==Medical benefits==