Which of the following weeds has been found useful to check water pollution caused by industrial affluents ? A)Parthenium B)Elephant grass C) Water hyacinth D)Both and above
Option C) Around the world, there is an increasing trend in areas of land, surface waters and groundwater affected by contamination from industrial, military and agricultural activities due to either ignorance, lack of vision, or carelessness. In the last three decades a special interest in the world is aroused by the potential of using the biological methods in the waste water treatment.
