> By the way, doesn't the climate change all the time? Yes indeed, see the research from Easterbrook posted by Craig. He makes the case that climate change is predictably cyclic in nature. Add to that the random events such as major volcanic activity or meteor strikes and the climate can vary widely and quickly. > Have humans always been in control of this? More likely, > they have never had much if any of an impact. I can't disagree with you or prove otherwise but I do suggest that the human dynamic has changed sufficiently over the past 60 years or so that the potential for climate change based upon our activity has become an issue. After all, the world's population has increased dramatically during that period as has our industrial activities. I don't know that this has impacted the climate but it certainly should not be dismissed given that warming has increased dramatically over the past 50 years. Dale > ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.