30 years?,100years,1000 years,1,000,000 years,10,000,000 years. What relevance does 30 years have on a place that is billions of years old and has changes it's appearance and temperature constantly?
North America was a tropical zone at one time for cryin' out loud. The critters that were then are no more. The earth changes with or without man, and another giant meteor hitting the earth will change it again.
Now tell me how the relevance of 30 years of temperature means anything and how it can change earth's evolution as it's going to change anyway.
Ok,
But what was Bob Carter talking about?