8Singapore

This city-state is home to plenty of billionaires, who come for its first-class education system, green buildings, and access to the most influential businesses in the world.

Despite a rapidly growing population, Singapore is one of the cleanest of all the major cities, ranked high on the Environmental Performance Index, and a global leader in sustainability. Strict laws help maintain this level of upkeep, with the improper disposal of chewing gum leading to a $1000 fine for first-time offenders, while vandalism comes with a punishment of eight strokes of caning.

RELATED ARTICLESMORE FROM AUTHOR