Category 6 Hurricanes? They've Happened

There is no official Category 6 for hurricanes, but scientists say they're pondering whether there should be as evidence mounts that hurricanes around the world have sharply worsened over the past 30 years -- and all but a handful of hurricane experts now agree this worsening bears the fingerprints of man-made global warming. In fact, say scientists, there have already been hurricanes strong enough to qualify as Category 6s. They'd define those as having sustained winds over 175 or 180 mph. A...Full Story
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