Look at the map of the world (with latitude and longitude). Now draw a line that represents about the 40 degree line north of the equator and 40 degree line south of the equator.
Notice how much land mass in the northern hemisphere is above the northern line and how much land mass in the southern hemisphere is below the southern line?
This gives you a good idea why many countries in the northern hemisphere are colder than countries in the southern hemisphere. There are lots of other factors, of course.
The land mass of the world is NOT equally divided or distributed between the north and south.
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