A new milestone of coral bleaching for the Great Barrier Reef | Full Story podcast

The Great Barrier Reef has been hit with another mass coral bleaching event, with aerial surveys showing almost no reefs across a 1,200km stretch escaping the heat. This is the sixth mass bleaching event for the reef and the first to ever happen during La Niña. Guardian Australia environment reporter Graham Readfearn breaks down what you need to know, and explains what it means for the push to list the reef as ‘in danger’