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.
Londoners Suneet Jeerh, Grant Cameron and Karl Williams, were found guilty of possessing synthetic cannabis.
The exception is Kandahar, where both poppy and cannabis growth is expected to increase this year.
Last year, Oguz says, Afghan police seized three times more cannabis than the year before.
He added that the study may explain why some people with mental illness turn to cannabis.
And an opinion poll for the Independent on Sunday found resistance to the legalisation of cannabis wavering.
Former CID officer Kenneth Simpson - a drug expert - told the jury that was a "huge amount" of cannabis.
They concluded that teenagers who took hard drugs did so whether they had first tried cannabis or not.
In 2010 Luis Lacalle Pou, an opposition congressman, proposed a bill to legalise cannabis cultivation for personal use.
ECONOMIST: Uruguayan drug legalisation: Thinking the unthinkable | The
Mr Herbert told the court about his son's descent into mental illness after he started smoking cannabis as a teenager.
BBC: James Herbert custody death inquest told of drug taking
Just as the United States was angry about Canadian whiskey-smugglers 80 years ago, it is increasingly edgy about cannabis today.
He also wrote that since the downgrading of cannabis there had been no proven increase in use of the drug.
Erick, a Dutch customer, thinks there is no way his government can put the clock back and criminalise cannabis again.
The report said the evidence suggested a "probable, but weak, causal link between psychotic illness, including schizophrenia, and cannabis use".
He also describes how scientists have found substances similar to cannabis that naturally occur in the brain in specific circumstances.
She also cautioned that there may be another explanation, such as depression, which could result in lower IQ and cannabis use.
BBC: Young cannabis smokers run risk of lower IQ, report claims
The jury was also told Mr Allen was previously convicted for fighting outside a nightclub, possessing cannabis and having a knife.
NACRO, a prison reform group, says that some switching from cannabis to heroin is going on, but the scale is unclear.
Henry, 22, who has paranoid schizophrenia, had stopped taking his medication and was a user of skunk cannabis, the court was told.
St Albans Crown Court was told the men were killed after one of them handed out a drug dealer's cannabis for free.
BBC: Teenagers shot dead in Milton Keynes 'drug turf' dispute
Other research into cannabis-based medication is continuing, looking at its effect on Alzheimer's disease, general post-operative pain, and wasting associated with Aids.
Prof Kopelman told the jury McCluskie said he suffered blackouts "infrequently" after drinking heavily and regularly smoking a strong form of cannabis.
Some of these chemicals are already in all our brains, cannabis smokers or not, as the brain has its own endocannabinoid system.
Under the French protectorate, cannabis cultivation was eradicated in most of Morocco.
ECONOMIST: Why it is hard to stop Moroccans growing a lucrative crop
The former Home Secretary, David Blunkett, downgraded cannabis from B to C - but that decision was reversed by one of his successors.
Former deputy Tory leader Peter Lilley prompted renewed debate by his call on Friday for cannabis to be legalised and sold through licensed outlets.
It arose when Ann Widdecombe, the Tory party's spokeswoman on home affairs, called for a mandatory fine for anyone caught in possession of cannabis.
At Bournemouth, when Ann Widdecombe made her controversial speech on cannabis, it was then seriously and properly argued about by Tory representatives in countless conversations.
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