### Elements and chemical compounds

Elements
C | Carbon
N | Nitrogen
P | Phosphorous
S | Sulphur
Chemical compounds
CO2 | Carbon dioxide
CH4 | Methane
CO | Carbon monoxide
N2O | Nitrous oxide
NO | Nitric oxide
NO2 | Nitrogen dioxide
O3 | Ozone
SO2 | Sulphur dioxide
(CH3)2S | Dimethyl sulphide (DMS)
Aerosols
Aerosols | Sulphate, black carbon and organic carbon

Groups of compounds
NMVOC | Non-methane volatile organic carbon compounds
NOx | Nitrogen oxides (NO + NO2)
Halocarbons
Chlorinated compounds | Other halocarbons
Chlorofluorocarbons (CFCs) | Hydrochlorofluorocarbons (HCFCs) | Other Chlorocarbons (CCs) | Bromocarbons | Perfluorocarbons (PFCs) & SF6 | Hydrofluorocarbons (HFCs)
CFC-11 (CCl3F) | HCFC-22 (CHClF2) | CCl4 a | Halon-1211 (CBrClF2) | CF4 | HFC-23 (CHF3)
CFC-12 (CCl2F2) | HCFC-123 (CF3CHCl2) | CH3CCl3 b | Halon-1301 (CBrF3) | C2F6 | HFC-32 (CH2F2)
CFC-113 (CCl2FCClF2) | HCFC-124 (CF3CHClF) | CH3Cl | CH3Br | SF6 c | HFC-43-10mee (C5H2F10)
CFC-114 (CClF2CClF2) | HCFC-141b (CH3CFCl2) |  |  |  | HFC-125 (C2HF5)
CFC-115 (CF3CClF2) | HCFC-142b (CH3CF2Cl) | HFC-152a (CH3CHF2)
| HCFC-225 (C3HF5Cl2) | HFC-134a (CH2FCF3)
| HFC-143a (CH3CF3)
HFC-227ea (C3HF7)
HFC-236fa (C3H2F6)
HFC-245ca (C3H3F5)
a carbon tetrachloride b methylchloroform c sulphur hexafluoride