Scientists warn oxygen levels in Earth's waters are rapidly and dangerously decreasing. Recent research led by University of California, San Diego reveals alarming decreases worldwide.

Oceans, lakes, rivers, and coastal waters are losing dissolved oxygen at unprecedented rates.

This global oxygen loss links closely with warming, pollution, biodiversity decline and acidification. Experts suggest dissolved oxygen decline could be irreversible within the span of human lifetimes.

Findings highlight how human activities are pushing nine environmental processes beyond safe boundaries. Oxygen concentration must now be considered within the Planetary Boundaries environmental framework, experts emphasize.