First of all, the climate in the south is humid and rainy, which will affect human health to some extent. In contrast, the climate in the north is relatively dry. Although the temperature is low in winter, the four seasons are distinct, which is more conducive to human health.
Secondly, there are many heavy industries in the north, and central heating may lead to a large temperature difference between indoor and outdoor, which will also have a certain impact on human health. Heating in winter in the north can prevent cold air from invading human body, protect human yang and reduce the incidence of cardiovascular and cerebrovascular diseases.
In addition, both southerners and northerners have adapted to their respective climatic environments, so they are healthy. Although the overall economic strength in the south is strong, the medical resources and environment are slightly inferior to those in the north.
To sum up, the northern and southern climates have their own characteristics, and the northern climate may be healthier, but both sides should take corresponding health measures to protect their bodies.