
In the Balbanera salt pans on the flat plains of the Bay of Cádiz, in southern Spain, biologist Juan Martín Bermúdez pulls a clump of long grass from the water. It appears unremarkable, a messy bunch of thin, flat tendrils that flutter in the salty coastal breeze. But this plant is a treasure.
Environmentalists have long known the value of Zostera marina in fighting climate change – underwater meadows of the seagrass can capture carbon 35 times faster than tropical rainforests.