The researchers studied how to clean up wastewater from making a chemical called 2,4-D. They found that using hydrogen peroxide with iron can remove most of the pollution in the water. They also used bacteria to clean the water further. By diluting the water and adjusting the pH, they were able to remove a lot of the pollution. In the end, they were able to get the water very clean, even after it had been partially or completely treated with chemicals.