Graphics: Atmospheric Trace Gases in Whole-Air Samples

The following links are for methane, nonmethane hydrocarbons, alkyl nitrates, and chlorinated carbon compounds including three chlorofluorocarbons (CFC-11, CFC-12, and CFC-113)

Worldwide Methane Concentrations

Halogenated Organic Compounds

• Carbon Tetrachloride
• CFC-11
• CFC-12
• CFC-113
• Chloroform
• Halon 1211
• Methyl Chloroform
• Tetrachloroethene

Alkyl Nitrates

• Ethyl Nitrate
• Methyl Nitrate
• i-Propyl Nitrate

Other non-methane hydrocarbons

• Ethyne
• Ethane
• Propane
• i-Butane
• n-Butane