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To: Sweet Ol who wrote (182372)1/28/2014 2:03:45 PM
From: Brian Sullivan5 Recommendations

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  Respond to of 206209
 
And in any case the most serious issue with regards to climate is to prevent the Earth's climate from returning to "normal" which is an Ice Age. Currently we are living in an interglacial period. These interglacial periods typically last around 10,000 to 15,000 years. Our current interglacial has persisted for 11,700 years, or longer if the start is moved to before the Younger Dryas.

The Ice Age that follows an interglacial usually last between 40,000 to 100,000 years. And result in glacial Ice sheets that are over two miles high and cover almost all of Canada. Seattle was covered under 2000 feet of Ice only 15,000 years ago. It was even worse in New York and Chicago only 20,000 years ago:

en.wikipedia.org

Over the past 2.5 million years the climate of the Earth has been in Ice Age mode about 90% of the time, with only about 10% of the time in interglacial mode.

en.wikipedia.org

ncdc.noaa.gov