Alaskan Rivers Turn Orange as Melting Permafrost Releases Toxic Metals

New study reveals the ecological and community impacts of mineral-laden waters in Alaska's Brooks Range.

Researchers have documented at least 75 rivers and streams in Alaska turning orange due to thawing permafrost.
The discoloration is caused by the release of metals like iron, zinc, and copper, making the water highly acidic.
Affected waterways have pH levels as low as 2.3, comparable to vinegar, posing a threat to aquatic life and fisheries.
The phenomenon, first observed in 2018, is visible from space and has led to the decline of fish species in some areas.
Scientists warn that the situation could worsen as climate change accelerates permafrost thawing.