The thoughtless attitude of man towards nature has led to the fact that water bodies, soil and atmospheric air are very heavily polluted, the increased concentration of radioactive substances, and also the living world has already lost dozens of species of animals and plants, and this loss is irreparable. Since 1600, humans have exterminated more than 150 species of birds and 100 species of mammals.
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.