Why do most global ecosystems form broad latitudinal belts across the world?

Look, I was gonna go easy on you and not to hurt your feelings
But I'm only going to get this one chance
Something's wrong, I can feel it (Six minutes, Slim Shady, you're on)
Just a feeling I've got, like something's about to happen, but I don't know what
If that means, what I think it means, we're in trouble, big trouble,
And if he is as bananas as you say, I'm not taking an

Answeris associated with sunny,dry weather;