Firstly, as part of the consultation on the Environment Bill which took place between 23 October 2013 and 15 January 2014, culminating in the Environment (Wales) Act 2016.
Yn gyntaf, fel rhan o'r ymgynghoriad ar Fil yr Amgylchedd a gynhaliwyd rhwng 23 Hydref 2013 a 15 Ionawr 2014, gan arwain at Ddeddf yr Amgylchedd (Cymru) 2016.