The intoxicating chemical in marijuana is tetrahydracannabinol , or THC . Average THC content has soared from less than 1 % to nearly 13 % . This means that the average person can get a lot of high out of one joint
The intoxicating chemical in marijuana is tetrahydracannabinol , or THC . Average THC content has soared from less than 1 % to nearly 13 % . Some experts are concerned about the long-term impact , including addiction .