Oeddech chi'n gwybod y gallech chi arbed £960 bob blwyddyn pe baech chi'n gostwng y tymheredd yn yr ysgol 1°C? Dywedwch wrth eich pennaeth beth hoffech chi ei wneud gyda'r holl arian yna!
Well done, you have scored 10 points so far and you're in 34ain position on the scoreboard. Complete your next activity to climb higher up the scoreboard!
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