I was watching a program called how the earth was made and they said at one time New York was covered in 1000 feet of ice. This was before man entered the picture. What caused global warming then? Their are petrified forests in Arizona. At one time great forests were present their. The planet changes it is the way the universe works everything is in constant change.

Also how acurate was the temperature collecting equipment 5000 years ago? We monitor more things about the planet than any time in world history. Maybe there were temperature changes like we're seeing today and our scientists just don't have their best guess right. After all what temperature measuring equipment did the native Alaskans have 300 years ago?

All the best,

Steve