One outcome of a recent open evidence session is the delivery of a key advice note (on the investigation of particulate matter in the Port Talbot area) from the UK Air Quality Expert Group.
O ganlyniad i sesiwn dystiolaeth agored ddiweddar cyflwynwyd nodyn cyngor allweddol (ar yr ymchwiliad i ronynnau yn ardal Port Talbot) gan Grŵp Arbenigol Ansawdd Aer y DU.