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| Q. |
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 (1) and (2) above |
| Answer» C. Water hyacinth | |
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Explanation: 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. |
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