I am not a one of the environmental nuts, I know the planet and solar system does whatever it is scheduled to do. Something like an immediate drop of several degrees Centigrade would be awful. I am sure many Canadians wouldn't be happy, nor many of our northern brothers. Heck, they would all come down here and we wouldn't be happy. Disaster.
There was once on Discovery a talk about some eggheads who went to some lake in Canada and took core samples of the sediments.
From decoding the pollens and sizes of the sediments they were able to determine how long it took one of the ice age periods to go from temperate climate to full-bore ice age glaciation.
Drum roll..............
90 years.
Less than a blink of an eye in geologic terms.
I would very happy - think how long the ski season would be, for one; how nice Phoenix and the Havasu Lakes would be with a more moderate summer; as well as the entire beautiful, but currently too hot Mexican Desert. I think there'd be plenty of room for all the Canadians that wanted to come.
What is that picture?