Think how the degree of influence of natural conditions changed from primitive man to modern man.

1. Gathering → agriculture → expansion of arable land → irrigation, drainage, fertilization. 2. From the cold animal skins → clothing → dwelling → heated dwelling.

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.