In which regions of our country the largest number of centenarians live. What is the reason for this?

According to statistical data, there are 4.5 thousand centenarians in our country living in various areas. These are people who are 90 or more years old. The leading level is occupied by Chechnya – 143 people and North Ossetia – 200 people. And in Ingushetia, the threshold of a long life span of 80 years has been exceeded! Longevity is promoted by both natural moments (clean water, air), and, for example, mental ones. Centenarians are positively disposed and take all the troubles of life with optimism.
But on our land there are many more places where the degree of residence leaves hope for the best. The peoples of Africa each time stood out for an unfavorable standard of living.
So the main factor in longevity is not only genetics, but also external factors – climate, nutrition, conditions of medical control.