Defined Terms and Documents      'Aboriginal Teenager Life Skills' RTV Social Inclusion Early Intervention Programme 

Composition Of Earth's Atmosphere means that nearly all of the Earth's atmosphere is made up of only nine gases:

Nitrogen -- N2 -- 78.084%

Oxygen -- O2 -- 20.9476%

Argon -- Ar -- 0.934%

Carbon Dioxide -- CO2 -- 0.0314%

Neon -- Ne -- 0.001818%

Methane -- CH4 -- 0.0002%

Helium -- He -- 0.000524%

Krypton -- Kr -- 0.000114%

Hydrogen -- H2 -- 0.00005%

See  GHG Emissions