debatable nga...

but there is increasingly more convincing evidence of the destructive effects that may be caused in part by global warming. retreating glaciers, greater temperature extremes, abnormal wildlife patterns (especially marine) among them. regarding hurricanes, it's tough to say that the recent string of hurricanes and flooding in Europe are caused by global warming (could well be random seasonal variations), but the trend is that there were more and more powerful hurricanes in the past decade than previous ones.