Mae Deddf yr Amgylchedd yn pennu ein huchelgais i leihau allyriadau yng Nghymru 80% erbyn 2050. Fe welwn o'r dystiolaeth y byddai'n rhaid sicrhau nad oes dim allyriadau o adeiladau er mwyn gwneud hyn. Ar hyn o bryd, allyriadau o gartrefi yw tua 15% o holl allyriadau Cymru.
The Environment Act sets out our ambition to reduce emissions in Wales by 80% by 2050. The evidence tells us that to do this, emissions from buildings will need to be close to zero. Currently, emissions from homes equate to approximately 15% of Wales’ total emissions.