Mae'r achos busnes wedi'i gwblhau erbyn hyn ac mae'n cynnwys argymhelliad gan dîm y rhaglen mai'r ffordd fwyaf effeithiol o gyflawni'r ymrwymiad yw sefydlu un corff amgylcheddol newydd i Gymru.
The business case has now been finalised and contains a recommendation from the programme team that the most effective way of taking this Programme for Government aim forward is to set up a new single environment body for Wales.