mass coral bleaching is a new phenomenon and was never observed before the 1980s as global warming ramped up.
mass coral bleaching is a new phenomenon and was never observed before the 1980s as global warming ramped up.
coral bleaching:121
the first mass global bleaching events were recorded in 1998 and 2010, which was when the el niño caused the oceans temperatures to rise and worsened the corals living conditions.