What factors: cosmic or terrestrial – affect the formation of the Earth’s ionosphere?

If the ionization of air occurred under the action of radioactive radiation of the Earth’s substance, then the concentration of ions would decrease with height.Investigations indicate an increase in the number of ions with height, which indicates the main role of the cosmic factor in the ionization of air, which is the short-wave (X-ray and ultraviolet) radiation from the sun.

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