Suspended particles, being in the air, enter the respiratory tract and can cause the development of lung diseases, cancer and cardiovascular diseases.
Heavy metals enter the human body through food chains and poison it. This leads to indigestion, serious lung and brain diseases. Also, heavy metals reduce human immunity, contribute to the growth of hereditary diseases.
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.