What do a smoker, alcoholic and drug addict have in common?

Nicotine, alcohol, psychoactive substances have a detrimental effect on the nervous system. The smoker, alcoholic and drug addict develop addiction.

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.