Man created many machines to facilitate his work and means of transportation, built cities and paved roads, mastered air and water spaces, ascended into space. Currently, man is increasingly transforming his natural environment. A person can move mountains, drain swamps and seas, create artificial lakes and rivers, and turn river channels.
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.