The real query is how much harm legal marijuana sales could cause. Initiative 502 bans gross sales to individuals beneath 21 and sets a 25% tax on each wholesale and retail gross sales, which shall be used to fund drug prevention, colleges and health insurance. One issue that does affect drug use is price, and legal marijuana would nearly actually be cheaper than that on the black market. If that’s true, and use will increase, the states that now have a mandate allowing marijuana use might face ...