This summer Welsh Government announced a ban on fossil fuels to heat newly built social homes, with ambitions for the private sector to follow suit by 2025.
Yr haf yma, cyhoeddodd Llywodraeth Cymru waharddiad ar danwydd ffosil i gynhesu tai cymdeithasol sy’n cael eu hadeiladu o’r newydd, gydag uchelgais i'r sector preifat wneud yr un peth erbyn 2025.