In order, the most abundant greenhouse gases in Earth's atmosphere are:*Water vapor ()*Carbon dioxide ()*Methane ()*Nitrous oxide ()*Ozone ()*Chlorofluorocarbons (CFCs)Atmospheric concentrations of greenhouse gases are determined by the balance between sources (emissions of the gas from human activities and natural systems) and sinks (the removal of the gas from the atmosphere by conversion to a different chemical compound).
Il metano è il prodotto della degradazione di materiale organico in ambiente anaerobico.