Defnydd trydan dyddiol eich ysgol yn eich wythnos ddewisol wedi'i gofnodi fesul metr
Newid unedau
Nid oes gennym ddigon o ddata ar hyn o bryd i arddangos y siart hwn
Mae data Electricity ar gael o Sad 1af Medi 2018 i Sul 26ain Tach 2023
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