chemical

Atmospheric

common name

formula

Sources

Importance

nitrous oxide

N₂O

Natural, fertilizer application, animal waste

   1,2

sulfur hexafluoride

SF₆

Insulator in high voltage systems

   2

CFC-12

CCl₂F₂

Refrigerant

   1,2

halon-1211

CBrClF₂

Fire extinguishing agent

   1,2

CFC-11

CCl₃F

Foam blowing agent

   1,2

CFC-113

CCl₂FCClF₂

Solvent

   1,2

chloroform

CHCl₃

Natural, waste treatment, paper production

   1

methyl chloroform

CH₃CCl₃

Solvent

   1,2

carbon tetrachloride

CCl₄

Solvent, feedstock for CFC production

   1,2

hydrogen

H₂

Hydrocarbon oxidation, combustion

methane

CH₄

Natural, ruminant animals, combustion

   2

carbon monoxide

CO

Combustion, hydrocarbon oxidation