Australia’s Great Barrier Reef is at a very high risk of extreme and widespread bleaching and “ecosystem collapse” linked to this year’s El Nino weather phenomenon, top scientists warned on July 21.

Australia's Great Barrier Reef is at a very high risk of extreme and widespread bleaching and "ecosystem collapse" linked to this year's El Nino weather phenomenon, top scientists…

Australia’s Great Barrier Reef is at a very high risk of extreme and widespread bleaching and “ecosystem collapse” linked to this year’s El Nino weather phenomenon, top scientists…