Initially the focus will be on the period between 2025 and 2030, but with the remit of the group expanding to focus on the period from 2030-2050 over time.
I ddechrau, bydd y ffocws ar y cyfnod rhwng 2025 a 2030, ond gyda chylch gwaith y grŵp yn ehangu i ganolbwyntio ar y cyfnod rhwng 2030-2050 dros amser.