Environmental pollution – the introduction into the environment or the appearance in it of new, usually non-characteristic physico-chemical and biological substances that have harmful effects on natural ecosystems and humans. It happens physical (noise, vibration, electromagnetic radiation), chemical (pesticides, heavy metals) and biological (viruses, bacteria).
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.