Robert Galarza outlines how blockchain technology can be utilised to verify, validate and standardise the efficacy of medical cannabis and other plant based ... called a hash which stores data ...

The hashish obtained in Madrid was found to contain dangerous levels of E.coli bacteria Cannabis resin sold on the streets of Madrid is contaminated with dangerous levels of faecal matter ...

and high-potency cannabis or skunk. Hash is made from the resin of the plant, while herbal cannabis is made from the dried leaves and flowering parts of pollinated cannabis plants. Getty Images ...