There were a number of challenges associated with current analysis of GHG emissions and the use and potential expansion of the GHGI.
Roedd nifer o heriau’n gysylltiedig â’r dadansoddiad presennol o allyriadau nwyon tŷ gwydr a’r defnydd a’r potensial o ehangu’r Rhestr Nwyon Tŷ Gwydr.