Since all this hysteria has started, every envirowhacko is staking man's viability, on a mere blink of an eye of data.  There is overwhelming evidence that in history, the earth has been much much warmer, and much much cooler.   Even as late a 1000 years ago, the global climate was warmer, even the Vikings colonized Greenland.  
There are so many factors that influence our climate.  Man himself impacts the tune of a gnat's wing flap in a hurricane.  I put a lot more stock in predicitve models of ocean currents, and even much much more in Sunspot activity.