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Man should not fiddle with balance of climate

By Thomas L. Friedman Jorgen Peder Steffensen made me an offer I couldn't refuse: "If you come to Copenhagen, I will show you a real Christmas snow, the snow that fell between 1 BC and 1 AD." Now that's an offer you don't get every day! But then I don't go to the Arctic Circle every day. "I can also show you a sample of the very last snow that fell right at the end of the last ice age, which was 11,700 years ago," said Steffensen.