Na2 So4
identify the nature of this reaction ​

Na2SO4 is not an reaction it is a compound named Sodium Sulfate having molar mass 142 g/mol

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.