Depends on how you define population. If I were to gamble on it, I would expect a (rather high) margin in opposition, with support rates highly correlated to education levels.
Yeah, I understood that's what you were talking about, from other comments - I was wondering which rmc was speaking of.
As to world population, I'm not sure you're correct (but also not at all sure you're incorrect). Yes, Russia and much of Africa and certainly the Middle East can be assumed to be majority opposed, but I'm not sure about Asian countries and that's a lot of people. Much of the west is obviously trending against you.