More recently medical researchers have begun to investigate cannabis' potential as a medicine once again.
BBC: NEWS | Programmes | Panorama | The use of medicinal cannabis
In 2003 Holland became the first country in the world to offer cannabis as a medicine.
BBC: NEWS | Programmes | Panorama | The use of medicinal cannabis
Following on from this, British firm, GW Pharmaceuticals began clinical trials of its own cannabis medicine.
BBC: NEWS | Programmes | Panorama | The use of medicinal cannabis
Doctors in the Netherlands were allowed to start prescribing medicinal cannabis to patients in 2003.
The report cited expert evidence saying cannabis use often coincides with an exacerbation of psychosis.
She had been smoking cannabis since the age of 12 and diagnosed with schizophrenia in 2005.
Londoners Suneet Jeerh, Grant Cameron and Karl Williams, were found guilty of possessing synthetic cannabis.
Prof Nutt was sacked after saying cannabis is less harmful than alcohol or nicotine.
They found about 2, 000 cannabis plants when they searched the property under warrant on Wednesday.
He was also found guilty of trafficking in cannabis and amphetamine over the same period.
BBC: Drugs gang ringleader Keith Blenkinsop cash confiscated
Ms Tabram is writing a book called Grandma Eats Cannabis, which will be in print soon.
BBC: NEWS | UK | England | Tyne | Cannabis grandmother's No10 trip
Ms Tabram admitting possessing cannabis with intent to supply, when she appeared in court last month.
BBC: NEWS | UK | England | Tyne | Cannabis grandmother's No10 trip
In her lengthy letter to Mr Blair, she claims commercially-produced medicines are more harmful than cannabis.
BBC: NEWS | UK | England | Tyne | Cannabis grandmother's No10 trip
And no differences were seen among cannabis users who belonged to the different genetic groups.
Tabram said she had been travelling to the Byker district of Newcastle regularly to buy cannabis.
BBC: NEWS | UK | England | Tyne | Cannabis grandmother spared jail
This is partly because the police are now seizing more cannabis on the streets.
The exception is Kandahar, where both poppy and cannabis growth is expected to increase this year.
Oguz says the cannabis plant is also much easier to grow than opium poppies.
Last year, Oguz says, Afghan police seized three times more cannabis than the year before.
His mother Valerie believes her son may have been killed over a cannabis debt.
Cannabis is the most commonly used drug, followed by cocaine powder, ecstasy and amphetamines.
Since 2004, when it finally banned cultivation, it has pushed cannabis-growing into the Rif's hinterland.
ECONOMIST: Why it is hard to stop Moroccans growing a lucrative crop
Early this month, police burnt cannabis fields around Larache, on the Rif's Atlantic edge.
ECONOMIST: Why it is hard to stop Moroccans growing a lucrative crop
Tests on the drivers revealed a range of drugs including cannabis, ecstasy and amphetamines.
BBC: NEWS | UK | Northern Ireland | 'Growing threat' of drug driving
Tests of a cannabis-based spray have also been shown to help relieve multiple sclerosis symptoms.
Even the Daily Telegraph has called for cannabis to be legalised for an experimental period.
Tull, of Landhill Farm, Ashwater, Devon admitted setting up a cannabis farm with 89 plants.
He added that the study may explain why some people with mental illness turn to cannabis.
In a recent culinary class, students were taught how to make cannabis-infused pasta and butter.
Pearl and Kellie mentioned obstacles they faced getting a licence under the name, Cannabis College.
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