In the upper layers of the atmosphere, under the influence of ultraviolet radiation from the Sun, oxygen is converted into ozone: 3О2 = 2О3. Allotropic modification of oxygen ozone provides life on Earth. Most of it is at an altitude of 15-25 km, where it forms an ozone layer, which absorbs radiation from the sun that are dangerous for living organisms and protects the Earth from sudden hypothermia. Without the ozone layer, the average temperature on Earth would be 30 ° C lower.
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.