Welsh News — October 2, 2017 at 11:46 am — Updated: October 2, 2017 at 11:46 am

Ynni solar arloesol ar Ynys Echni

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Defnyddio technoleg ynni solar arloesol yn cael ar Ynys Echni, ar arfordir Caerdydd, i gwrdd ag anghenion trydan cynyddol ar yr ynys.

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