Others compare nitrogen to oxygen http://www.soest.hawaii.edu/GG/ASK/atmo-nitrogen.html http://www.soest.hawaii.edu/GG/ASK/atmo-nitrogen.html http://www.soest.hawaii.edu/GG/ASK/atmo-nitrogen.html http://www.soest.hawaii.edu/GG/ASK/atmo-nitrogen.html http://www.soest.hawaii.edu/GG/ASK/atmo-nitrogen.html