Some of the people we interviewed had strong views on how to design and run services sustainably but found it difficult to measure services’ environmental impact.
Roedd gan rai o'r bobl a gyfwelwyd gennym farn gref ar sut i ddylunio a rhedeg gwasanaethau yn gynaliadwy ond roedd yn ei chael hi'n anodd mesur effaith amgylcheddol gwasanaethau.