Pa ymrwymiadau y mae Llywodraeth Cymru wedi'u gwneud i symleiddio'r ffordd y caiff llygredd aer ei reoli i fodloni gofynion deddfwriaethol, a gwella iechyd pobl a'r amgylchedd yng Nghymru?
Wedi'i ateb gan Ysgrifennydd y Cabinet dros yr Amgylchedd a Materion Gwledig | Wedi'i ateb ar 30/06/2016
In recognition of the widespread impact of air pollution on human health, the Welsh Government has defined one of Wales' national indicators to be the average level of nitrogen dioxide outside dwellings.
I will be publishing details of the proposals to refresh local air quality and noise management in Wales later this year.