Ddydd Llun 7 Rhagfyr, yng Nghynulliad Cyffredinol Cynghrair y Taleithiau a Rhanbarthau, lansiais y Memorandwm Cyd-ddealltwriaeth rhyngwladol hanesyddol ar weithredu ar sail natur dros yr hinsawdd.  Rwy’n falch bod Llywodraeth Cymru wedi datblygu’r Memorandwm hwn, sy'n seiliedig ar y gwaith polisi yr ydym wedi'i wneud wrth ddatblygu Bil yr Amgylchedd ac sy’n cefnogi confensiwn y Cenhedloedd Unedig ar Amrywiaeth Fiolegol a’r UNFCC. Yn ogystal â Chymru, llofnodwyd y Memorandwm gan bump o lywodraethau blaenllaw eraill COP21 (sef Catalonia, Gwlad y Basg, Manitoba, Sao Paulo a Quebec).
On Monday 7 December I launched an historic international Memorandum of Understanding on Nature Based Climate Action at the States and Regions Alliance General Assembly. I am proud that the Welsh Government has developed this Memorandum, which draws on the policy work we have undertaken in developing the Environment Bill and supporting the delivery of the UN convention on Biological Diversity and UNFCCC. In addition to Wales, five other leading governments signed the Memorandum at COP21 (Catalonia, Basque Country, Manitoba, Sao Paulo and Quebec).