[Reily]

That middle Miocene really suffered from the industrial excesses of the earlier Miocene.
It must of have been caused by a mammoth amount of industrial activity.

You can look at the written record in Europe and see temperature trends change. The late classic period through the Early to Mid-Middle Ages talks about several changes in temperature.
My guess is we are leaving a cooling trend and entering a warming trend. The activity of man scurrying and scratching around has very little to do with it.

[AndrewC]

I concur