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.
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.
The consumption of homegrown cannabis has risen sharply over the past decade.
The Commonwealth plans to legalise local production of cannabis for medical and research purposes; as do Victoria and NSW. But what laws need to change for all of this to work?