[BBCNature]
Theseunderwaterworldsareevenmorebiodiversethantropicalrainforests–andjustlikerainforests,coralreefsfacesignificantthreatstotheirexistence.Sowhat’scausingsomanyoftheseincredibleecosystemstodieout–andwhat’sbeingdonetopreservethem?
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