Welsh Government is committed to developing more granular air quality evidence and supplementing existing information to support policy and legislative development in Wales.
Mae Llywodraeth Cymru wedi ymrwymo i ddatblygu mwy o dystiolaeth ansawdd aer gronynnog ac ychwanegu at wybodaeth bresennol i gefnogi datblygiad polisi a deddfwriaethol yng Nghymru.