Geography is actually around us. As long as we observe and think carefully, we can find it.

Our skin colors are light yellow and dark yellow. This is also worth pondering. This has a lot to do with our geographical environment. We live in the north temperate zone, and the depth of skin color is closely related to the time in the sun. The ultraviolet rays of the sun will stimulate melanin. Most of our skin colors are yellow. According to my research, there are several reasons.

We are in the temperate zone, not in the tropical direct point, the sun is oblique, and the sunshine intensity is small;

Related to latitude

2.a. In the plain area, the sun often shines on the sunlight in the plain area, which is weakened a lot because it passes through the atmosphere and tens of thousands of meters of air. The sunshine intensity in the plain area is small and the skin is white.

B. In the plateau area, sunlight can easily reach the ground through the atmosphere, and most of the energy is preserved, with strong sunshine. People in this area have darker and warmer skin.

In basin C, because of the blocking of mountains, the sunshine will be reduced and the skin will be whiter.

This is related to the terrain.

3.a. The quality of life in developed areas is high and the standard is high. They live in houses, enjoy the Internet, do activities at home, work in buildings and have the ability to buy whitening products. Skin is whiter.

B. In backward areas, there is no house, and the skin is exposed to the sun and absorbs a lot of ultraviolet rays; Malnutrition leads to emaciation and affects skin color. Often engaged in heavy work, the body is seriously injured, and it is easy to turn black. The skin in this area is darker.

Related to the degree of development.

4. It is related to heredity. Generally speaking, children born in white are also white, and children born in black are also black and mixed-race, which is between the skin color of their parents.

5. China is located in the monsoon climate zone, with very developed agriculture and high grain output. China is also actively introducing food crops to foreign countries. Therefore, there are many food crops in China, and different crops have different effects on skin color. For example, eating carrots is easy to turn yellow. Related to national conditions

6. It is related to people's mood. People in a good mood generally have good skin. People who are often worried will definitely not have a good skin condition.

7. It is related to people's age.

8. It is related to local natural resources and climate. In places with abundant precipitation, sufficient water resources, fresh air and small temperature difference, people's skin is more likely to turn white.

9. Other factors. For example, the skin of a person exposed to radioactive substances will immediately become

I think the main reason is sunshine.

Ah, geography is great! In fact, geography is all around us. As long as we are willing to explore the mystery, we will learn a lot from it.