The Grand Canyon is Full of Mercury
Researchers find high levels of mercury and selenium in plants and animals along the Colorado River
The Grand Canyon boasts one of the most breathtaking natural landscapes on Earth, and draws over 4.7 million visitors each year. Now, writes UPI’s Brooks Hays, researchers have discovered something else in the canyon: mercury contamination.
When researchers from the U.S. Geological Survey measured levels of mercury and selenium at six sites along 250 miles of the Colorado River, writes Hays, they found “significant levels of mercury and selenium in plant and animal samples.” In a release, the researchers noted that concentrations of these chemicals “regularly exceeded risk thresholds for fish and wildlife…