As a result of the photolysis of water, oxygen is released as a by-product. This led to the creation of the Earth’s oxygen atmosphere, and, consequently, to the possibility of aerobic respiration (more effective). In addition, in the upper atmosphere, oxygen is converted into ozone, an ozone screen is created that protects against ultraviolet radiation, which made it possible for plants and animals to land.
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.