I tried to understand those numbers but failed. They come from https://nida.nih.gov/research/research-data-measures-resources/cannabis-potency-data https://nid

I tried to understand those numbers but failed. They come from https://nida.nih.gov/research/research-data-measures-resources/cannabis-potency-data https://nida.nih.gov/research/research-data-measures-resourc... which shows a clear rise. However, they are taken from 'cannabis products distributed in the illegal marijuana marketplace in the United States', as submitted by the DEA and police agencies, and I can't help but wonder about possible sample biases. Like, if the cops find "ditchweed" - low-potency hemp plants - did they used to send that in for testing, while nowadays they don't? If so, that would result in the observed trend, but not reflect what people actually used to get high. I tried to figure that out, but quickly gave up, since the part I quoted 'unclear whether this hurts or helps the health of the typical smoker' was more relevant. Fundamentally it doesn't matter since, as The Atlantic piece mentioned, you can buy products with higher THC levels ("better living, through chemistry!"), and are not limited to what the plant can make.