@Setanta,
												You have just demonstrated that you do not know what air or soil are. 
So I will educate you, air is composed of 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%
Xenon -- Xe -- 0.0000087%
 And soil is defined as.   
1. 
the portion of the earth's surface consisting of disintegrated rock and humus. 
2. 
a particular kind of earth: 
"sandy soil."
3. 
the ground as producing vegetation or as cultivated for its crops: 
"fertile soil."
4. 
a country, land, or region: 
"an act committed on American soil."
5. 
the ground or earth: 
"tilling the soil."
6. 
any place or condition providing the opportunity for growth or development: