View further information on the impacts of poor air quality and health​​​​​​​ ​ ​​​​​​​​​​​External link opens in a new window ​
Cymerwch olwg ar ragor o wybodaeth am effeithiau ansawdd aer gwael ar iechyd​.​​​​​​​​​​​ ​ ​​​​​​​D​olen allanol yn agor mewn ffenest newydd