Can you tell the difference? (Hemp is on the right.)

Although both marijuana and hemp are weeds, have a similar leaf shape, and are subspecies of the Cannabis sativa plant, they are in fact very different. Marijuana has flowering buds with a high content of THC (delta-9 tetrahydrocannabinol) the stuff that makes you feel “high”. Hemp, on the other hand, has a very low THC content, can be grown closely together, and it can be used to make a variety of useful products. (You cannot get high from smoking hemp.) Hemp and marijuana were once considered separate entities. The 1937 Marihuana Tax act was focused on the THC-producing variety. It wasn't until 1970, when the Comprehensive Drug Abuse Prevention and Control Act took over lumping hemp and marijuana in the same category, making both illegal, and creating confusion in people's minds to this day.