Hemp and THC
According to David West, PhD, "The THC levels in industrial hemp are so low that no one could ever get high from smoking it. Moreover, hemp contains a relatively high percentage of another cannabinoid, CBD, that actually blocks the marijuana high. Hemp, it turns out, is not only not marijuana; it could be called 'antimarijuana.'"
West, David P, Hemp and Marijuana: Myths and Realities (Madison, WI: North American Industrial Hemp Council, 1998), p. 3.