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Why isn’t the sea recovering?

How can the Baltic Sea still be heavily eutrophic when the nutrient loads have been decreasing for decades?

Researchers at Stockholm University Baltic Sea Centre often say that the eutrophication situation in the Baltic Sea is improving. Still, large algal blooms are frequent and the oxygen-depleted sea bottoms are larger than ever. How is this possible?

A new film from Stockholm University Baltic Sea Centre explains how systemic lag effects and the physical properties of the Baltic Sea make recovery in the sea slow.