Chwiliwch am eich gweithgaredd arbed ynni nesaf i sgorio pwyntiau ar gyfer eich ysgol, lleihau eich defnydd o ynni a dysgu rhagor am ynni a newid yn yr hinsawdd
You have completed 0/8 of the activities in the Byddwch yn Egniol! programme Complete the final 8 activities now to score 70 points
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