This seems to be a strange one to be on the list of illegal substances. Of all the drugs which were listed in my textbook in my health class in high school, thi

This seems to be a strange one to be on the list of illegal substances. Of all the drugs which were listed in my textbook in my health class in high school, this is the only drug which I could pick in the wild. Marijuana might have grown in those areas, but someone had to go through the effort of growing the plants. There are places in the US where marijuana grows in the wild, but I don't think you can get high from it (though you still might get busted for carrying it).