State of Fear is brilliant

[MaC]

Well, I hope John as well as others realize I'm no fan of enviro-fear mongerers.  I dismiss a lot of what is said since we really don't have much of a basis for what's being said.  However one thing has to be asked.  Although I don't believe human activity has done much wrong for the environment (as least in comparrison to which most say).  One observation needs to be challenged in order to dismiss human interaction in global warming.  Since the Earth's formation there have been many ice ages.  The larger deal of time was made of of 90% ice age, 10% warmth (like we have now).  The warmer periods where the earth isn't mostly glacially covered last around 10,000 years.  Right now, we're over due for another ice age-but there's not one currently happening.  Now it may be just a loose corelation, but human development has been incredibly high over the past 10,000 years, primarily with the agricultural revolution.  The revolution has led to a significant change in the carbon cycle-which thus is assumed to be the cause of the warmer Earth now (as we are due for an ice age now).  I'm pretty convinced that this is the case-because of farming (and of course other factors by human presence) the Earth has not cooled off and receeded to ice age.  Can you or the book refute this?