Dangerous levels of lead contamination have been found in vape cartridges. California's newly revised and strict regulations mean that many vape carts are failing at the point of testing.
The fungal disease responsible for the 2017 and 2018 hemp blight has been identified.
A recent study from Purdue University highlights the problems and obstacles preventing the regulation of pesticide use in cannabis cultivation.
South Carolina is still against the legalization of medicinal and recreational cannabis within the state, but this has not stopped them from supporting scientific research into the therapeutic uses of the plant.
Young people in conservative states may use cannabis very differently to their peers in liberal regions - even if they all have legal access.
The US government recently legalized the farming and use of hemp products with very low THC levels. Here we look at the implications and regulations surrounding this decision.
Regulators are looking at instilling pesticide testing and tighter regulations following cannabis recall in California. Washington's lack of a cannabis testing program is now facing scrutiny and a call to get up-to-date on testing issues.