The gasses created by rotting sargassum are also toxic: last month, several seaside schools in Martinique were forced to close after hydrogen sulphide and ammonia levels spiked.
Some companies want to help. One called Seafields has developed a system to catch the algal tide before it reaches shore, using satellite images and drones to track the sargassum's movements.
Sand, sun and stench
https://economist.com/interactive/the-americas/2025/07/17/sand-sun-stench
from The Economist
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