There has been a considerable increase in the number of newly registered ultra-low emissions vehicles in Wales in recent years, with the number nearly tripling between 2019 and 2020 to over 3,600.
Bu cynnydd sylweddol yn nifer y cerbydau allyriadau isel iawn sydd newydd gael eu cofrestru yng Nghymru dros y blynyddoedd diwethaf, gyda’r nifer bron yn treblu rhwng 2019 a 2020 i dros 3,600.