Read here. Anything climate event that is perceived as negative usually results in leftist/liberals (and the MSM) assigning blame to the supposed human-caused, "unprecedented" global warming. Unfortunately for global warming alarmists, objective science always seems to find causes other than human CO2 emissions. The large coral bleaching event of 1998 is another one of those that scientists have determined was not human CO2-based but a result of natural, cyclical events.