Mae Grŵp yr Amgylchedd Hanesyddol yn fforwm cenedlaethol a gaiff ei arwain gan Cadw sy’n cynnwys cyrff y sector cyhoeddus, cynrychiolwyr o sefydliadau’r sector gwirfoddol a pherchenogion safleoedd hanesyddol. Gofynnwyd i Is-Grŵp Newid Hinsawdd y Grŵp asesu ac adrodd wrth y Grŵp ar y modd y dylai sector yr amgylchedd hanesyddol yng Nghymru fynd i’r afael â her y newid yn yr hinsawdd. Ffrwyth eu gwaith nhw yw Yr Amgylchedd Hanesyddol a Newid Hinsawdd: Cynllun Addasu’r Sector. Mae’r Cynllun yn deillio o ymgynghori helaeth â rhanddeiliaid ac mae’n cyd-fynd â chynllun addasu Llywodraeth Cymru ar y newid yn yr hinsawdd, sef Ffyniant i Bawb: Cymru sy’n Effro i’r Hinsawdd.
The Historic Environment Group (HEG) is a national forum, led by Cadw, that consists of public sector bodies and representatives of voluntary sector organisations and owners of historic sites. The HEG Climate Change Subgroup was charged with assessing and reporting to HEG on how the historic environment sector in Wales should address the challenge of climate change. They have reported on this through the Historic Environment and Climate Change in Wales Sector Adaptation Plan. The plan results from extensive consultation with stakeholders and sits alongside the recently published Welsh Government climate change adaptation plan for Wales, Prosperity for All: A Climate Conscious Wales.