Greenhouse gas (GHG)
Atmospheric gas that absorbs and re-emits infrared radiation, contributing to warming of the Earth’s surface. Regulatory inventories and the GHG Protocol cover the seven Kyoto Protocol gases: carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulphur hexafluoride (SF₆) and nitrogen trifluoride (NF₃).
See also: CO₂ equivalent (CO₂e)
Reference source: www.ipcc.ch
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