Buoys in the Rio Grande could change southern border, SIUE researchers find

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4. It's a very troubled river without the buoys

The Rio Grande is contaminated with toxic pollutants and infectious microorganisms. These pollutants include heavy metals, sewage, agricultural and industrial chemicals, and salts.
The Rio Grande's flow has been reduced by dams, irrigation, and other human uses. This has caused the river to no longer flood naturally, which is important for wildlife and vegetation.
The Rio Grande often has high levels of bacteria, especially in areas downstream from the Falcon International Reservoir.
The Rio Grande's pollution has caused at least seven fish species to disappear from the Big Bend area, including the American eel, the sturgeon, and the Rio Grande silvery minnow. (Source: Google)