that s the first month that pot was legal to sell for nonmedicinal purposes in that state. 2 million! tax revenue. the new legalized marijuana industry is a big business. cnn s ground breaking reporting on weed continues tonight at 10:00, eastern time. that s when dr. sanjay gupta s special, which is weed 2: cannabis madness gets under way. we have a preview of dr. gupta s latest marijuana documentary. have a look. let s talk about marijuana and your brain. it s a rather complicated process, so let s start off with what s familiar to you. thc. thc is the chemical in weed that gets you high. you feel light-headed, feel giddy. sometimes relaxed. marijuana you can smoke it, you can eat it and and inhail it with a vapor pen or consume in an oil form. it s especially good for little kids, taking as a medicine. no matter the method, thc goes through your bloodstream and into your brain. and there the thc will latch on