Invasive aquatics choke Rio Grande

Two non-native aquatic weeds are creating an international incident, of sorts, along the Mexican-U.S. border. Hydrilla and water hyacinth are clogging the Rio Grande to the point where many Mexican communities that use the river have no water whatsoever. Brownsville, Texas, which also utilizes the Rio Grande, has had no supply interruptions due to pumping and reservoirs that are used to store water.


If this were simply an American matter, the weeds would not be nearly such a problem. However, Mexican officials object to the use of aquatic herbicides, fearing they will taint drinking water supplies. Since the river crosses an international boundary, the United States cannot unilaterally decide to apply chemicals.

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