Independent: Scientists have expressed alarm at the devastating impact of climate change on the world's coral reefs.
More than a third of Earths reefs are now under threat due a process known as bleaching, in what could be the worst crisis ever to hit these vital ecosystems.
Bleaching, where the symbiotic relationship between algae and small animals called polyps breaks down, can occur under heat stress and has been linked to multiple weather events including the latest severe El Nio phenomenon. The...