First of all, in fact, the dense population in big cities is a kind of pollution, and it is also the pollution of overpopulation, because a city has only such a large area, but there are many people he can't afford and there is so much air, but more than so many people breathe the air in this sky, and the increase of population has caused the proliferation of high-rise buildings. The air is more stagnant, and then the economy and technology in big cities are developed, which means that too much industrial waste and too much sewage will be produced, which will naturally have some impact on human life.
However, there are no such problems in rural areas. Because of the development of society, the rural population has been decreasing, which naturally reduces the pressure on the environment. In addition, the general rural areas are actually in a very good geographical position, and most of them are surrounded by mountains and waters. Because people originally chose the countryside for a better life, the rural ecological environment has certain advantages.
In addition, many people in rural areas will plant some vegetables and fruits and do a lot of greening. Moreover, rural greening is already natural, and the natural air quality will be much better. Then, good air quality is also good for people's health. We should know that we humans live by oxygen, which means that air quality is very important to our human health, so the air quality in rural areas is good, which is very suitable for the needs of human health.