Oxygen levels have decreased in almost 80 percent of rivers worldwide, and they're going to continue losing this precious resource unless we make some serious changes. Satellite and climate data collected between 1985 and 2023 reveal that over 16,000 rivers across the world have been losing their dissolved oxygen. On average, these rivers have been losing 0.045 milligrams of oxygen per liter each decade. Without enough dissolved oxygen essential to sustain life underwater, rivers – and the