**7.5 Rhizo-degradation**

It is the microbial breakdown of pollutants in plant root zones [16]. Plants influence a site's water balance, alter the pH and redox potential of the soil, and promote microbial activity. These unintended effects could increase root zone destruction or lessen chemical leakage into groundwater. Upon entering plants, substances may be metabolized, retained, or volatilized into the atmosphere [12].
