A record amount of sargassum has piled up along coastlines of the Caribbean and Gulf of Mexico. Sargassum is a brown seaweed that causes lower oxygen levels and foul-smelling gases when it decomposes on beaches.
A record amount of sargassum has piled up along coastlines of the Caribbean and Gulf of Mexico. Sargassum is a brown seaweed that causes lower oxygen levels and foul-smelling gases when it decomposes on beaches.