(Reuters) - Half of the world's mangrove ecosystems are at risk of collapse as a result of human activity, rising sea levels and extreme weather, according to the latest survey by an international conservation group.
Unless action is taken, a quarter of the world's total mangrove areas could be completely submerged within 50 years, with critically endangered ecosystems in India, Sri Lanka and the Maldives expected to bear the brunt, said the International Union for the Conservation of Nature (IUCN) in an assessment published on Wednesday.
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