It isn't, though. You are probably looking at the equator and may be thinking this way because southern hemisphere has much less land than the northern hemisphe

It isn't, though. You are probably looking at the equator and may be thinking this way because southern hemisphere has much less land than the northern hemisphere, and almost all of this land has tropical weather. But most of the land is also clustered near the equator: Australia, Brazil, South Africa etc. are warm, but so are Egypt, India and Mexico. This image [1] may help. [1] http://upload.wikimedia.org/wikipedia/commons/f/f8/World_map_with_equator.jpg http://upload.wikimedia.org/wikipedia/commons/f/f8/World_map...