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Old 11-22-2012, 06:39 PM   #77
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Under the best case reduction scenarios of greenhouse gases, we've already delayed the onset of the next ice age for a long, long time. Under current continental positions and earth's orbital patterns, it is projected the CO2 levels would need to be well below 300 ppm for an ice age to occur.

So if the goal is to prolong our interglacial period through altering the earth's atmosphere, we can declare mission accomplished. Under no greenhouse gas reduction scenario advocated by anyone are we going to have an ice age any time soon (tens of thousands of years).

http://dotearth.blogs.nytimes.com/20...-anthropocene/
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