'Greenhouse gas' means any of the following gases, either alone or in combination: 1. Carbon dioxide (CO2); 2. Hydrofluorocarbons; 3. Methane (CH4); 4. Nitrous oxide (N2O); 5. Perfluorocarbons; and 6. Sulphur hexafluoride (SF6). (Added to NRS by 2007, 1906)
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