Emissions of “f-gases”: hydrofluorocarbons, perfluorocarbons and sulphur hexafluoride are measured against the base year 1995.
Caiff allyriadau ‘nwyon f’, sef hydrofflworocarbonau, perfflworocarbonau a sylffwr hecsafflworid eu mesur yn erbyn blwyddyn sylfaen 1995