The greenhouse people have never
given me an answer when I bring up
the ice age
The "Ice Age" should only be a problem for the millions of people who now live North of the Mason Dixon line. During the last Ice Age, not many were displaced from Chicago, New York etc. Now they will need to migrate to the Southern States - could make the Southern Border crossings look like a trickle. Climate change when there are less than a million people on earth is different then now with ? 8 Billion people? People MIGRATE for various reasons; employment, health, family etc. When the land becomes covered in ice they have no choice but to move. So, an ice age like we had before will look real different to a lot of folks in the USA and beyond. Currently the drought in many parts of the world is looking like it will cause "migration" on an epic scale - if people can't grow food THEY will MOVE. When you see people migrating like locusts, you will know the conditions are getting extreme.
NW Bear has hit upon some interesting points. The glacier did not cover a great deal of what is now called the US. It did cover much of Canada however.
The glacier did some things which cannot be seen anywhere but where the glacier covered. One effect that can be seen in some places yet today, is a feature called a "drumlin".
A drumlin is a pile of gravel deposited by the melting glacier, where the gravel is drained down through a melted hole or drain.
Some drumlins have an assortment of gravels by layers, while others can have just one variety.
I happen to live in an area that is roughly a circle 5 miles across, that is a deposit of very fine gravel.
My neighbor, who has a large gravel mining operation, and a fleet of about 75 Mack trucks, tells me it is some
of the best gravel in the world, makes excellent concrete.
Sometimes for certain special constructions, he will ship to surrounding states.
Below, see map of Ice Age, as well as some pictures of drumlins.