> Why can't we live in a world where everyone wears heated clothes and we just leave the windows open (even in winter)? If the goal is to keep the place warm,

> Why can't we live in a world where everyone wears heated clothes and we just leave the windows open (even in winter)? If the goal is to keep the place warm, shouldn't the windows be closed? (I'm from a tropical part of the world where there's no such thing as winter)