So, cwestiynau pwysig a chwestiynau mawr. Mae Dyfrig wedi cymryd ei fwgwd bant, so fe wnaf i fynd at Dyfrig yn gyntaf.

So, important, big questions there. Dyfrig has taken his mask off, so I'll go to Dyfrig first.

Rydw i'n cydnabod bod eich Llywodraeth chi'n gwneud astudiaeth annibynnol ar hyn o bryd i mewn i'r diffiniad o 'dai fforddiadwy', ond rwy'n credu taw'r broblem sydd wedi bodoli dros y blynyddoedd gyda hynny yw bod yna ystadau newydd yn cael eu datblygu yng Nghymru nad ydynt, yn ôl diffiniad lleol, yn rhywbeth y mae pobl yn gallu eu fforddio. Cyn yr haf gwnes i godi gyda chi y ffaith bod Cymorth i Brynu yn caniatáu i lot o deuluoedd uwchraddio eu tai - teuluoedd efallai sydd ddim angen yr arian hwnnw. Fel rhan o'r adolygiad rydych chi'n ei gynnal fel Llywodraeth, a fyddwch chi'n edrych i mewn i hyn? Oherwydd efallai byddai mwy o arian ar gael ar gyfer tai fforddiadwy pe byddai peth o'r arian hwnnw yn mynd i mewn i greu mwy o dai cymdeithasol yn ein cymunedau.

I recognise that your Government is carrying out an independent study at the moment into the definition of 'affordable housing', but I think the problem that has existed over the years with that is that new estates are developed in Wales that don't, according to a local definition, amount to what is 'affordable' locally. Before the summer I raised with you the fact that Help to Buy allowed many families to upgrade their homes - families that perhaps don't need that funding support. As part of the review that you're currently conducting as a Government, would you look into this issue? Because perhaps there would be more funding available for affordable housing if some of those funds went into creating more social housing in our communities.

Diolch yn fawr. Mae'r fforwm ieuenctid yn swnio'n ddifyr iawn, a'r gwaith da efo sir Benfro. Os oes yna fwy o dystiolaeth ynghylch hynny fedrwn ni ei chael, buasai hynny'n cyfoethogi ein dealltwriaeth ni. Felly, hwyrach y bydd yna gyfle maes o law inni gael mwy o wybodaeth ar hynny, os gwelwch yn dda, Dafydd. Dyna'r cyfan gennyf i. Diolch yn fawr, Cadeirydd.

Thank you very much. The youth forum sounds very interesting, and the good work in Pembrokeshire. If there's more evidence about that that we could have, it would enrich our understanding. So, perhaps there'll be an opportunity in due course for us to have more information on that, Dafydd. That's all from me. Thank you very much, Chair.

Fe wnaf hynny. Mae'n ymddangos braidd yn wrthnysig ein bod yn cael y ddadl hon yma. Felly, hoffwn glywed gan y Llywodraeth sut y mae'n bwriadu mynd ar drywydd y mater hwn yn y dyfodol. Oherwydd rwy'n credu ei fod yn rhan bwysig o'r strwythur llywodraethu cyffredinol y gall y Llywodraeth fynd ar drywydd trethiadau amgen.

I will do so. It seems rather perverse that we have this debate here. So, I would like to hear from the Government how they intend to pursue this matter in the future. Because I think it's an important part of the overall structure of governance that the Government is able to pursue the matter of alternative taxations.

Yn sicr, a dyna pam, wrth gwrs, mae gennym ni'r cynigion ar gyfer y metro. Rydym ni'n gwybod na all ffyrdd fod yn ateb i bopeth; mae'n rhaid iddyn nhw redeg ochr yn ochr â gwelliannau i drafnidiaeth gyhoeddus. Dyna y bwriedir i'r metro yn y de-ddwyrain ei gyflawni. Mae'n fodel yr ydym yn bwriadu ei ddefnyddio mewn rhannau eraill o Gymru, fel y gogledd-ddwyrain, yn y dyfodol. Cyfleustra'r gwasanaeth, trenau dibynadwy, gwasanaeth rheolaidd - mae'r rhain i gyd yn ffyrdd y gallwn eu defnyddio i annog mwy o bobl allan o'u ceir.

Absolutely, and that's why, of course, we have the metro proposals. We know that roads cannot be the solution to everything; they must run in tandem with public transport improvements. That's what the metro in the south-east of Wales is intended to deliver. It's a model that we look to use in other parts of Wales, such as the north-east, in the future. Convenience of service, reliable trains, regular service - these are all ways in which we can encourage more people out of their cars.