Commentary Quick. Do you know whether marijuana is legal in your state? Is it approved for medical or even recreational use? If you don’t know, that is completely understandable. We are a collection of 50 different states with a wide-ranging patchwork of laws regulating cannabis, nearly all of which are in direct opposition to federal law. It’s difficult to generalize on the state-by-state tally because the laws are so different. One state’s medical marijuana law may be limited to products containing cannabidiol, abbreviated to CBD, a chemical extracted from cannabis and sold in oils, sprays, patches, and lotions. Another state’s legislation might be more liberal, allowing CBD products plus sale of loose marijuana for smoking or for edible products like brownies. Some states require a doctor’s prescription for purchase, while others require only proof of residency. Generally speaking, as of February of this year, 39 states plus Washington, D.C., have …