Question

why do 90 % of the world's total population concentrate in the northern hemisphere?

Answer 1

There is more land north of the equator. 67.3% of the Earth's land mass is in the northern hemisphere. The southern hemisphere is 80.9% ocean. ... That's almost 30% of the total land mass of the southern hemisphere. So it's safe to say that less than 10% of the southern hemisphere is habitable.

Answer 2

Answer: World's 90 % of people concentrate in Northern hemisphere because most of the land masses lie in the Northern part of the earth which has fertile soil which is better for people to reside. ... For this reason, world's 90% people concentrate in the Northern hemisphere