CNN Weed Dr. Sanjay Gupta Reports March 29, 2014 07:38:00
For someone that is not experienced in marijuana smoking takes some of this, and they're going to go into the negative effects of the high, the psychosis, the irritation, irritability, paranoia, all of this. >> while not all the plants are this high, there's no question he has seen a trend. in 1972 the average potency was less than 1% thc. now it's nearly 13%. >> are people becoming more obsessed with high thc marijuana? >> i think so. they're starting out with a half a percent and 1%, and they get a good high, and then as they continue to use that, it doesn't give them the same high anymore, ...