Dechreuwyd ymgyrch i gadw'r drysau a'r ffenestri ar gau pan fydd y gwres ymlaen
Mer 30ain Tach 2022
Climate Justice Revolution group students use checklist to check classrooms during social times to see if lights have been left on and/or windows are open.
Disgyblion sy'n cymryd rhan yn y gweithgaredd hwn:
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