A summary and explanation of the earths warming and cooling cycles appeared in the National Geographic, October 2007 issue. There is a graph showing the earths temperature and CO2 levels going back 400,000 years.
One thing the article pointed out is that in the past, temperature lead and CO2 followed. What is different now, is that CO2 is leading - that has never happened before and is what has the scientists excited.
Personally I don't believe looking at local temperature records over a limited period of time are instructive - just too much variation in the weather.
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Today's Featured Article - The River Tractor - by Charlie English Jr.. This is a 4010 John Deere that was used to farm on the Diamond Island which is in the Ohio River about 15 miles southwest of Evansville, Indiana. About ten years ago, this tractor was parked close to the bank as the river was washing the bank of the island away.
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