Re: NANFA-- Want a really scary scenario?
Sun, 25 Aug 2002 17:07:46 EDT

In a message dated 8/25/02 2:12:01 PM Eastern Daylight Time, writes:

<< This is the case with many properties in western PA including my own-
which I have watched transform over the course my short time on Earth.
Most climate models main flaw is the fact that humans are so short lived. The
Earths natural state is much warmer than it is now, to us it's seems warm
compared to the most recent ice age but go back just few million years and
the earth was a much warmer place with very little in the way of ice caps and
much higher sea level. Mostly short cold periods are separated by long
periods of very warm conditions. Even during the so called reign of the
dinosaurs there were short glacial periods every few million years. The most
believable theory is ocean currents, continental drift, and calm periods of
volcanism are the main reason for ice ages. As the sun ages it also gets
warmer. The Earth is doomed to get warmer eventually ending up much like
Venus, hopefully many million years from now, the last estimate I have seen
was at least one billion before the oceans boils away. Many factors control
the earths climate most are positive or negative feed back type effects that
will keep the earth cool enough for life for a long time. the last time these
effects failed was about 700 million years ago when it is thought the entire
earth was covered by ice. Oddly that was when animal life as we know it first
appeared so we may owe our very existence to the earth almost becoming locked
in a permanent frozen state. It is thought that a huge upswing in volcanic
activity was what saved the earth from being a glistening white snow ball
forever. So much heat was reflected back into space that without a tremendous
build up a greenhouse gasses the earth would still be a snow ball to this
day. Not long after the snow ball earth the polar caps disappeared completely
coming and going again after a few dozen million years but never covering the
oceans again.

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