1. Singapore The city has lowest infant mortality rate and highest life expectancies, that is, 84.7 years.
It has the most efficient healthcare facilities in the world and is one of the cleanest cities.
There are strict laws for cleanliness like littering the road is forbidden. On road traffic has been reduced by government through increasing taxes, congestion charges etc .
Moreover, the city's mass transit system is the lifeline for more than 2 million passengers everyday thus reducing traffic congestion andn pollution. The garden city consists of many lush green parks.