From an important and comprehensive piece by Philip Stott at ABC News, a few quotes:
From the Babylon of Gilgamesh to the post-Eden of Noah, every age has viewed climate change cataclysmically, as retribution for human greed and sinfulness.
Extreme weather events are ever present, and there is no evidence of systematic increases. Outside the tropics, variability should decrease in a warmer world. If this is a "crisis," then the world is in permanent "crisis," but will be less prone to "crisis" with warming.
Sea levels have been rising since the end of the last ice age, most rapidly about 12,000 years ago. In recent centuries, the average rate has been relatively uniform. The rate was higher during the first half of the 20th century than during the second. At around a couple of millimeters per year, it is a residual of much larger positive and negative changes locally. The risk from global warming is less than that from other factors (primarily geological).
Read the whole thing.