[colorado tanker]

Cooling could be really, really bad. Consider New York City under the ice - Long Island is a terminal moraine. How about the most fertile farmland in the country either under ice or tundra. How about humanoid settlement in Britain has never made it through an ice age?

Still, if the pattern of the past revealed in the ice cores holds, we're not yet to the next interglacial maximum.

[darth]

Of course, Texas, Louisiana, et al, will add 100 miles more or so of land as the Gulf of Mexico recedes (the water is locked up in the glaciers).

Imagine Galveston 100 miles inland. Lots of very productive cropland possible on what used to be ocean bottom.