Industrial hemp became legal nationwide when President Donald Trump signed the 2018 Farm Bill into law. But local police officers who now encounter huge shipments of state-certified hemp on America’s highways can’t tell if the plants they’re seeing are hemp or marijuana. The two types of cannabis look and smell alike. They can only be told apart by precise testing for the amount of the high-inducing THC in them. Law enforcement is frustrated because they can’t easily tell who’s breaking the law and who isn’t.
