Nitrogen Gas - N2
Nitrate - NO3 -
Nitrite - NO2 -
Nitrogen Dioxide - NO2
Nitrous Oxide - N2O
Nitrogen Oxides - NOx
Nitric Acid - HNO3
Ammonia - NH3
Ammonium - NH4+
Calcium carbonate (limestone) - CaCO3
Methane - CH4
Carbon Dioxide - CO2
Carbon Monoxide - CO
Carbonic Acid - H2CO3
Volatile Organic Compounds - VOC
Sulfur Dioxide - SO2
Sulfates - SO4 -2
Sulfur Oxides - SOx
Sulfuric Acid - H2SO4
Mercury - Hg
Lead - Pb
Water- H2O
Chlorofluorocarbon - CFC
Oxygen gas - O2
Ozone - O3
Particulate Matter- PM
Phosphate - PO4 -3