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To: Lazarus_Long who wrote (1754)	3/7/2002 8:37:58 PM
From: E	Read Replies (1) of 21057

Yes. These things were happening long before humans appeared on the planet. From non-human causes. Say, variations in solar radiation is a suspected cause. Yes, and when they did happen from non human causes significant things happened which we were fortunately not around to experience: An abrupt change in climate, of the kind that occurred during the Younger-Dryas interval, could prove catastrophic for ecosystems and species around the world. During that particular period, for instance, spruce, fir and paper birch trees experienced mass extinction in southern New England in less than 50 years. The extinction of horses, mastodons, mammoths, and sabre-toothed tigers in North America were greater at that time than in any other extinction event in millions of years. I have no idea what should be done, but among the options that should be discussed, I would definitely not recommend denial or dismissing with a wave of the hand the opinions of the top climate scientists at the US National Academy of Sciences (NAS) - the nation's most august scientific body.

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