Bil Treth Gwarediadau Tirlenwi (Cymru) yw'r trydydd o gyfres o dri Bil i sefydlu trethi newydd yng Nghymru – cyfres o ddeddfwriaeth hanfodol bwysig i baratoi ar gyfer cyflwyno'r trethi Cymreig cyntaf ers bron 800 mlynedd. Mae Llywodraeth Cymru hefyd wedi mynd ati'n gydweithredol i gael cefnogaeth drawsbleidiol ar gyfer y Bil, gan gytuno ar welliannau na chynigiwyd gan y llywodraeth i ddatblygu'r ddeddfwriaeth ymhellach.
The Landfill Disposals Tax (Wales) Bill is the third of three Bills to establish tax arrangements in Wales – a series of crucial legislation to prepare for the introduction of the first Welsh taxes in almost 800 years. The Welsh Government has also adopted a collaborative approach to gain cross-party support for the Bill, agreeing non-government amendments to further improve the legislation.