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Newyddion
Sut mae bolltau yn erbyn sgriwiau'n effeithio ar gynaliadwyedd?
содержание y cymhwysiad gwahaniaeth materol a chynhyrchu hirhoedledd ac ystyriaethau gwastraff addysg a chyfrifoldeb defnyddwyr o ran byd clymwyr, y ddadl rhwng ...