2. Tokyo, Japan
The life expectancy in Tokyo is one of the highest at 84.19 years.
The reason being the health and hygiene of Japanese people, their culture, their habit of eating rice, fish and veggies.
Moreover, the government invests enough in public health and sanitation.
The strong family and community bond in Japanese people is also one of the reasons. The city has been successful in reducing its carbon emmissions since the advent of mass trsnsit system which moves approximately 3 million people in a day.
According to World Bank, the CO2 emission per capita is 4.89.
