English: Generating your own Energy: A planning guide for householders, communities and businesses
Welsh: Cynhyrchu eich Ynni eich hun: Arweiniad cynllunio ar gyfer cartrefi, cymunedau a busnesau
Subject: Amgylchedd
English definition: Published by the Welsh Assembly Government, 2010.
Welsh definition: Cyhoeddwyd gan Lywodraeth Cynulliad Cymru, 2010.