| A. | collision between fast neutrons and nitrogen nuclei present in the atmosphere |
| B. | action of ultraviolet light from the sun on atmospheric oxygen |
| C. | action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere |
| D. | lightning discharge in atmosphereClick here for more on this paper....... |
Monday, 24 March 2014
A. collision between fast neutrons and nitrogen nuclei present in the atmosphere
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