In the quiet seaside village of Capesterre on Marie-Galante island in Guadeloupe on April 18, 2023, the air-quality monitoring institute Gwad’Air issued a “red alert” to warn people away from coastal areas. The culprit was sargassum. After washing ashore for days, the floating seaweed was emitting a dangerous level of hydrogen sulfide gas as it rotted on the beach. The problem was not new … [Read more...]