Why does 80% of the world’s population live on the plains (up to a height of 500 m) and only 1% in the mountains at an altitude of more than 2000 m?

since in the mountains there is more rarefied air, a colder climate, in the mountains very often destructive natural phenomena occur that worsen a person’s life: earthquakes, eruptions of ulcans, landslides, landslides, avalanches.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.