This document discusses bioremediation and phytoremediation. It defines bioremediation as using living organisms to treat environmental pollution by removing contaminants. There are different types of bioremediation based on the microorganisms or degradation process used. In situ bioremediation treats contaminants on-site, while ex situ bioremediation removes material to be treated elsewhere. Phytoremediation uses plants to stabilize, remediate or reduce contaminated soils and waters through processes like phytoextraction and rhizofiltration. The document outlines techniques for both and notes that while bioremediation is less expensive than other methods, it can be time-consuming and dependent on microbial populations and environmental factors