Environment actually plays a role in life expectancy and many tend to set some criteria to meet for them to change to another environment or place.
In the 2021 classification of cities most desired to lived in and city least desired to be lived in, check the 2021 grading.

Auckland-Zealand, Osaka-Japan, Brisbane-Australia and Geneva-Switzerland leading the pack for most desirable cities to live in 2021.

Least desired, check where Lagos-Nigeria stands.

https://www.cnn.com/travel/amp/worlds-most-livable-cities-2021/index.html