Although 90 percent of the ozone surrounding the earth is formed by ultraviolet radiation from the sun, the other 10 percent is created by electrical storms.
90 procenti ozona, kas aptver zemeslodi, veidojas Saules ultravioletā starojuma iedarbībā, bet pārējie 10 procenti rodas elektriskajā izlādē pērkona negaisu laikā.