Norwegian fish farms released 75,000 tonnes of nitrogen, 13,000 tonnes of phosphorus and 360,000 tonnes of organic carbon in 2025, according to a Sunstone Institute report, polluting fjords with nutrient levels equivalent to raw sewage from tens of millions of people annually. The pollution depletes oxygen levels in fjords and raises concerns about destructive algal blooms, with Norway being the world's largest farmed salmon producer.
Otto Beta
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Norwegian fish farms released 75,000 tonnes of nitrogen, 13,000 tonnes of phosphorus and 360,000 tonnes of organic carbon in 2025, according to a Sunstone Institute report, polluting fjords with nutrient levels equivalent to raw sewage from tens of millions of people annually. The pollution depletes oxygen levels in fjords and raises concerns about destructive algal blooms, with Norway being the world's largest farmed salmon producer.