phytoremediation
/ˌfʌɪtəʊrɪmiːdɪˈeɪʃn/noun
The technique of planting trees, grasses, or other vegetation in order to remove contaminants in the soil or the groundwater through accumulation (and sometimes degradation) in plant tissues, or to promote their microbial degradation or immobilization in association with plant root systems.
Origin
1990s. From phyto- + remediation, probably after bioremediation.
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