[DoreenMichele]

Excerpt:

some scientists are hopeful that hyperaccumulators could be used to "clean" soil where there has been a build-up of toxic material due to human activity.

Other potential applications include phytomining - growing hyperaccumulator plants on nutrient-poor but metal-rich soils to extract the elements they take up.

[willyt]

They could mine contaminants from the WW! battlefields in the Zone Rouge. https://en.wikipedia.org/wiki/Zone_Rouge