Julien Deswaef> "[...] the #cannabis plant is what’s called a bioaccumulator. That means it’s especially good at absorbing minerals from the soil and air and water. In fact, cannabis has been used to remediate contaminated sites. But if you’re growing cannabis for human consumption, that absorbency can be a problem. One recent medical study found that cannabis users have higher levels of lead and cadmium in their blood than non-users."
https://freakonomics.com/podcast/what-does-it-take-to-run-a-cannabis-farm/
Karl Theodor