Oeddech chi'n gwybod y gall y DU gynhyrchu mwy o ynni o dyrbinau gwynt ar y môr nag unrhyw wlad arall?
Oeddech chi'n gwybod ym 1920, roedd 1,250,000 o bobl yn cael eu cyflogi yn y DU i gloddio am lo, a bod llai na 3,000 yn cael eu cyflogi erbyn hyn?
You have completed 0/8 of the activities in the Byddwch yn Egniol! programme Complete the final 8 activities now to score 70 points and 30 bonus points for completing the programme
Well done, you have scored 30 points so far and you're in 18fed position on the scoreboard. Complete your next activity to climb higher up the scoreboard!
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