Pollution of the Amazon River in 2026 is driven primarily by industrial mining, agricultural runoff, and untreated urban waste. Small-scale "artisanal" gold mining is one of the most devastating factors; miners use mercury to separate gold from sediment, which then leaches into the water, poisoning the fish and the indigenous communities that rely on them. Deforestation—largely for cattle ranching and soy production—causes massive soil erosion, leading to increased sedimentation that chokes the river's delicate ecosystems. Additionally, because many cities along the Amazon (like Manaus or Iquitos) have grown faster than their infrastructure, billions of gallons of untreated sewage and plastic waste are dumped directly into the river system daily. Agricultural pesticides and fertilizers used in the massive soy plantations also wash into the tributaries, creating "dead zones" where the water oxygen levels are too low to support aquatic life. These combined human activities threaten not only the river's biodiversity but the global climate regulation provided by the Amazon basin.