Aerial video shows mass coral bleaching on Great Barrier Reef amid global heat stress event – video

Scientists have recorded widespread bleaching on the Great Barrier Reef as global heating creates a fourth planet-wide bleaching event. According to the National Oceanic and Atmospheric Administration's Coral Reef Watch, 54% of ocean waters containing coral reefs have been experiencing heat stress high enough to cause bleaching

• Global heating pushes coral reefs towards worst planet-wide mass bleaching on record