Propagandists say this and they're idiots. For example, they say weed is 3-4-5 times stronger then it used to be when they used crappy NIDA samples of schwagg with seeds and stems which were at most like 5 % thc. Anyone saying weed is 5 times stronger is a moron. Take a potent strain which has 15% thc, if it was 5 times stronger, then this would equal 75% thc which isn't true. Now take a 21% strain if it's 5 x stronger then that's 105% thc which is impossible. Don't buy into any government bullshit. The reality is, that with advancing technology and cross breeds there are more potent varieties available then there were, but not by much. They had dank back in the sixties as well. Even with this new found 'super skunk' the higher the thc, the less one needs to consume to feel high, therefore one smokes less the more potent the cannabis, thus, less potential lung damage. These people just don't know what they're talking about.