Here's a now ranking from the Mercer Institute. To me it's kinda supprising but since it's only the top 50 every city can be proud to be on the list since there are thousands of citys in this world^^ Hope you enjoy reading
News Release: 2010 Mercer Quality of Living survey
When do you think people die?
When they are shot through the heart by the bullet of a pistol?
No.
When they are ravaged by an incurable disease?
No.
When they drink a soup made from a poisonous mushroom?
No!
It's when... they are forgotten.
~Dr. Hiluluk - One Piece