Dechreuwyd ymgyrch i droi offer cegin ymlaen dim ond pan fo angen
Gwe 27ain Hyd 2023
By transferring all the foods goods from one fridge to another to cut down on the using 2 refrigerator, by switching off gas burner and only using one for cooking during the school day
Disgyblion sy'n cymryd rhan yn y gweithgaredd hwn: 10
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