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.
New York and New Jersey race to become the 11th state to legalize recreational cannabis in the US.
The fungal disease responsible for the 2017 and 2018 hemp blight has been identified.
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.
A recent study from Purdue University highlights the problems and obstacles preventing the regulation of pesticide use in cannabis cultivation.
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.