Baltic Sea Basin: A Semi-Enclosed Sea with Eutrophication Hotspots
波罗的海流域：半封闭海域与富营养化热点区
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The Baltic Sea is one of the world’s largest brackish water bodies, fed by over 200 rivers across nine nations.
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Its limited connection to the North Sea via narrow straits restricts water exchange and slows pollutant flushing.
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