trace gases that influence how energy flows in the Earths atmosphere by absorbing infrared radiation. There are six primary Greenhouse gases covered under the Kyoto Protocol Methane CH4, Carbon Dioxide CO2, PFCs perfluorocarbons, Nitrous Oxide N2O, Hydroflourocarbons HFCs, and Sulphur Hexaflouride SF6. It is important to note that CO2, ozone, methane, and water vapor nitrous oxide all occur naturally.
