However, many of the adverse effects have subsequently reduced or reversed (further analysis of the impact on inequalities is included in the More Equal Wales chapter).
Fodd bynnag, mae llawer o’r effeithiau niweidiol wedi cael eu lleihau neu eu gwrthdroi wedyn (mae dadansoddiad o'r anghydraddoldebau wedi’i gynnwys yn y bennod Cymru sy’n Fwy Cyfartal).