The Large Sargasse Belt Has Linked Two Continents in 15 Years: "a Public Health Problem and a Heavy Economic Burden"

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The green seaweed tides return every summer to the beaches in Brittany. In the tropical Atlantic, a similar phenomenon has just been discovered but on the scale of an ocean. For more than a decade, a gigantic ribbon of brown algae connects Africa with America, revealing a profound transformation of marine balances.