The relative percentages, by volume, of the Earth's atmospheric gases are (approximately): Nitrogen (N2): 78.08% Oxygen (O2): 20.95% Argon (Ar): 0.93% Carbon dioxide (CO2): 0.038% Water (H2O): 1%...
The principal constituents of the atmosphere of Earth are nitrogen (78 percent) and oxygen (21 percent). The atmospheric gases in the remaining 1 percent are argon (0.9 percent), carbon dioxide (0.03...
Various is a word that means to have a lot of different results, or meanings, or basically anything - it just basically means to have a lot of differences between a group or a collection of something.