Not all drugs should be banned those who are using marijuana or leaves maybe it would be legalize world wide bcoz this is medicine and it proves already drugs has differenct uses but depends on us when we are going to us it.
Cannabis contains blood within 2 weeks after use. If you legalize its use you will always run the risk of being arrested for driving in a condition of narcotic intoxication. You are willing to part with his car for marijuana use?