Right on that... Even in just the past 10 years, it's changed so much. I remember the first time I ever tried smoking weed, I was 10 years old. I was being nosey and found a joint in my sisters room and smoked it. It was pretty strong, especially for a 10 year old... But then I smoked weed again when I was 17, 7 years later, and it was sooo much stronger than it was before. More chemicals are added than back in the "old days". There's no denying that.