Lleihau ôl-troed ecolegol Cymru : offeryn cyfrifo adnoddau ar gyfer defnyddiaeth gynaladwy : adroddiad cryno = Reducing Wales' ecological footprint : a resource accounting tool for sustainable consumption : report summary.
WWF Cymru.
Stockholm Environment Institute.
Caerdydd : WWF Cymru,
2005.
Stockholm Environment Institute - on cover.
Teitl clawr = Cover title.
Energy consumption
Energy conservation