Green·house Gas ['grEn-"haus 'gas]. Any gas that absorbs infra-red radiation in the atmosphere. Greenhouse gases include water vapor, carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), halogenated fluorocarbons (HCFCs) , ozone (O3), perfluorinated carbons (PFCs), and hydrofluorocarbons (HFCs).
water vapor,
carbon dioxide (CO2),
methane (CH4),
nitrous oxide (N2O),
halogenated fluorocarbons (HCFCs) ,
ozone (O3),
perfluorinated carbons (PFCs), and
hydrofluorocarbons (HFCs).