A still from the 1936 propaganda film ‘Reefer Madness.’
Research from the last few decades suggest marijuana helps more than it harms. But Jeff Sessions' proposed crackdown would take us back nearly a century.
Patients in 29 states can legally use medical marijuana to treat their symptoms.
Patients in 29 states rely on medical marijuana to treat pain, nausea, seizures and other ailments. But all that could change.
Marijuana brand name stickers are visible as customers line up at the counter in CannaDaddy’s Wellness Center marijuana dispensary in Oregon in April.
(AP Photo/Don Ryan)
There's a strong case for governments to allow cannabis producers to brand their products via packaging and advertising like any other product. It could boost quality and consumer satisfaction.
Results may vary.
Many hope that marijuana will help their insomnia. A sleep psychologist examines the evidence.
Thousands of South Africans are calling for the legalisation of marijuana.
If South Africa's argument in court is that marijuana causes harm, it deserves to lose. The real question it should ask is whether criminal prohibition is the effective way forward.
This is what a marijuana plant, growing legally in Colorado, looks like.
The federal government outlaws marijuana, but many states are legalizing it. Coupled with the growing number of cannabis-related patents, the potential for court battles is dizzying.
High government taxes on legalized marijuana could push people back to the black market.
(THE CANADIAN PRESS/Darryl Dyck)
The Liberal government is on the way to legalizing marijuana. They should keep taxes low to discourage the black market.
Will Trump’s America lose out on the next big thing in business?
Mexico and Canada are about to turn medical cannabis into North America's most lucrative new market.
While the law is slowly coming along, those who need medicinal cannabis are mostly still unable to obtain it.
So far, only a few patients have been able to obtain lawful medicinal cannabis, and only after a long and difficult struggle.
A woman with MS leaves a licensed medical cannabis dispensary in Illinois.
AP Photo/Seth Perlman
There are many anecdotal reports indicating cannabis' beneficial effects for treating MS symptoms, but research with cannabis is difficult to do.
Lucy Haslam and Alex Wodak helped convince the public and politicians that the time for legalised medicinal cannabis had come.
In 2016 three Australian states and the Commonwealth passed laws to legalise the growing of medicinal cannabis. It was an extraordinary result for a campaign that struggled for decades to gain traction.
Despite dozens of trials internationally, the evidence on medical cannabis is unconvincing.
NSW is about to embark on the largest and most definitive clinical trial ever of medicinal cannabis for chemotherapy-induced nausea and vomiting.
Cannabis is on display at Shango Premium Cannabis, in Portland, Oregon, Sept. 30, 2015.
Timothy J. Gonzalez/AP
The trend toward marijuana legalization is growing, but the legality, or illegality, of cannabis at the federal level hasn't changed at all.
There is incredible variation between strains of cannabis plant.
AAP Image/QLD Police
The Australian government will now accept licence applications for groups wanting to grow cannabis for scientific and medical purposes. But there's still a lot we don't know about this complex plant.
Millions of Americans in nine states will vote on Nov. 8 for the right to do this.
Robert F. Bukaty/AP
Nine states are deciding whether to legalize marijuana. Yet the drug's prohibition at the federal level has created an unstable financial environment for producers and retailers.
A variety of medical marijuana strains are seen at a dispensary in Denver in 2011.
With restrictions to cannabis loosening at the state level, research is badly needed to get the facts in order.
There is strong evidence that cannabis is useful for treating a range of conditions. Legalising small-scale cultivation is a start to helping those in need.
Legalisation of cannabis for therapeutic use is happening slowly in Australia.
Cannabis has a long history, and its misuse hangs over it like a dark shadow.
Sea of Green Farms in Seattle, Washington.
An era of prohibition may soon be over for marijuana, and powerful players are watching. A legal expert explains how smaller, local producers can keep their pot in the game.
In some states this is medical marijuana.
The phrase 'medical marijuana' might give you the image of people buying plants or dried marijuana to smoke. But that's not always the case.