A remote-powered camera glides through the sunlit, turquoise waters of this corner of the western Indian Ocean, capturing rare footage of what scientists believe is the world’s largest seagrass meadow.
Human activity is helping destroy the equivalent of a soccer field of these seagrasses every 30 minutes around the world, according to the U.N. Environment Programme (UNEP). And scientists are now racing to take stock of what remains.
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