Our way of life determines it.

I grew up in an Island in Greece, far away from polution and no way near fast food. I was eating things coming straight from the nature. Even when I needed meat it would be slaughtered the same day...

I moved to a big city. I can see how my fitness has changed a bit with the heavier breathing and the different hours plus the way that the eye cannot see beyond a certain block. Although I haven't adopted fast food life I can say that the things I prementioned have changed my fitness and peace of mind as well.

I wouldn't like my kids to grow up here.