The contentious measure passed 5-2, despite the protests of small-scale growers, who argue that industrialisation will drive family farms operating at the margins of the law out of business.
The city of Oakland, in California, is bidding to become the Silicon Valley of marijuana cultivation, following a council vote to approve four huge cannabis factories, taxed and regulated by the authorities.
The contentious measure passed 5-2, despite the protests of small-scale growers, who argue that industrialisation will drive family farms operating at the margins of the law out of business.