In what other ways could the Welsh Government improve financial incentives to reduce, reuse, recycle or dispose of qualifying materials via more sustainable methods than landfill?
Ym mha ffyrdd eraill y gallai Llywodraeth Cymru wella cymhellion ariannol i leihau, ailddefnyddio, ailgylchu neu waredu deunyddiau cymwys drwy ddulliau mwy cynaliadwy na thirlenwi?