Cleaning up polluted sediments isn’t an easy task. Standard remediation methods include dredging contaminated sediments or capping with clean sand. Both procedures are costly and disruptive to the existing ecosystem. Enter Upal Ghosh. Ghosh, who researches the effects of toxic pollutants on the environment, had developed a way of using the charcoal, the same kind found in home water filters, to effectively bottle up the contamination and keep it out of the ecosystem. Ghosh’s idea had been tried successfully before, but only to a small degree, Greene said. Ghosh did some reconnaissance of Mirror Lake and agreed the procedure could …