Australia's Great Barrier Reef hit by 'worst' bleaching

Name: Australia's Great Barrier Reef hit by 'worst' bleaching
Uploaded: 2016-03-29T15:22:12.000Z
Duration: 51 s
Description: Evidence that Australia's Great Barrier Reef is experiencing its worst coral bleaching on record has renewed calls for the UN to list it as "in-danger".

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Evidence that Australia's Great Barrier Reef is experiencing its worst coral bleaching on record has renewed calls for the UN to list it as "in-danger".

BBC News looks at what causes coral bleaching.

Video produced by Jilla Dastmalchi. Images courtesy of Getty

Science & Environment

29 March 2016