// Definition
The use of plants to absorb and remove contaminants — including heavy metals, pesticides, and radioactive compounds — from contaminated soil. Cannabis is notably effective at phytoremediation and was famously planted at the Chernobyl disaster site to help clean irradiated ground. This property is a double-edged sword: cannabis grown in contaminated soil will concentrate those toxins in its tissues.
// From the Episode
Phytoremediation came up in Episode 2 when the panel discussed the relationship between cannabis and its growing environment. The key point was that cannabis is exceptionally efficient at pulling compounds out of soil — which makes it useful for environmental cleanup but dangerous for consumption if grown in contaminated ground. The Chernobyl example was cited: cannabis was planted in the exclusion zone specifically because of its ability to draw radioactive isotopes out of the soil. This has direct implications for medical cannabis — if the plant is grown in soil containing heavy metals, pesticides, or other pollutants, those compounds will end up concentrated in the final product, including in trichome heads used for extraction.
// Source
Ep. 002 Hash Church Episode II →